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YAML to JSON Converter: Convert YAML to pretty-printed JSON instantly in your browserOctober 1, 2026 · 3 min read · Use the free YAML to JSON Converter to convert YAML to pretty-printed JSON instantly in your browser.XML Formatter: Beautify and validate XML documentsOctober 1, 2026 · 3 min read · Use the free XML Formatter to beautify and validate XML documents.WiFi QR Code Generator: Create a QR code that shares WiFi credentials for easy connectionOctober 1, 2026 · 3 min read · Use the free WiFi QR Code Generator to create a QR code that shares WiFi credentials for easy connection.UUID Generator: Generate v4 UUIDs singly or in bulkOctober 1, 2026 · 3 min read · Use the free UUID Generator to generate v4 UUIDs singly or in bulk.User Agent Parser: Parse a user-agent string into browser, OS and deviceOctober 1, 2026 · 3 min read · Use the free User Agent Parser to parse a user-agent string into browser, OS and device.URL Encoder/Decoder: Percent-encode and decode URLs and query parametersOctober 1, 2026 · 3 min read · Use the free URL Encoder/Decoder to percent-encode and decode URLs and query parameters.TOTP / 2FA Code Generator: Generate time-based OTP codes from a secret for 2FA testingOctober 1, 2026 · 4 min read · Use the free TOTP / 2FA Code Generator to generate time-based OTP codes from a secret for 2FA testing.Timestamp Converter: Convert Unix epoch timestamps to and from human-readable datesOctober 1, 2026 · 3 min read · Use the free Timestamp Converter to convert Unix epoch timestamps to and from human-readable dates.Systemd Timer Explainer: Explain and build systemd OnCalendar expressions in plain English, with the next 5 run timesOctober 1, 2026 · 4 min read · Use the free Systemd Timer Explainer to explain and build systemd OnCalendar expressions in plain English, with the next 5 run times.Subnet Overlap Visualizer: Paste multiple CIDR blocks or IP ranges and see their coverage and overlaps on a visual mapOctober 1, 2026 · 4 min read · Use the free Subnet Overlap Visualizer to paste multiple CIDR blocks or IP ranges and see their coverage and overlaps on a visual map.SQL Formatter: Beautify and indent SQL queries for readabilityOctober 1, 2026 · 3 min read · Use the free SQL Formatter to beautify and indent SQL queries for readability.Slug Generator: Create SEO-friendly URL slugs from textOctober 1, 2026 · 3 min read · Use the free Slug Generator to create SEO-friendly URL slugs from text.SHA-512 Hash Generator: Generate SHA-512 hashes for textOctober 1, 2026 · 3 min read · Use the free SHA-512 Hash Generator to generate SHA-512 hashes for text.SHA-256 Hash Generator: Generate SHA-256 hashes via the Web Crypto APIOctober 1, 2026 · 3 min read · Use the free SHA-256 Hash Generator to generate SHA-256 hashes via the Web Crypto API.SHA-1 Hash Generator: Compute SHA-1 hashes for text inputOctober 1, 2026 · 3 min read · Use the free SHA-1 Hash Generator to compute SHA-1 hashes for text input.Secure UUID Generator: Generate cryptographically secure v4 UUIDsOctober 1, 2026 · 3 min read · Use the free Secure UUID Generator to generate cryptographically secure v4 UUIDs.Salt Generator: Generate random cryptographic salts in hex or Base64October 1, 2026 · 3 min read · Use the free Salt Generator to generate random cryptographic salts in hex or Base64.ROT47 Encoder/Decoder: Apply the ROT47 substitution cipher to textOctober 1, 2026 · 3 min read · Use the free ROT47 Encoder/Decoder to apply the ROT47 substitution cipher to text.ROT13 Encoder/Decoder: Apply the ROT13 letter-substitution cipher to textOctober 1, 2026 · 3 min read · Use the free ROT13 Encoder/Decoder to apply the ROT13 letter-substitution cipher to text.Regex Tester: Test regular expressions against sample text with live match highlightingOctober 1, 2026 · 3 min read · Use the free Regex Tester to test regular expressions against sample text with live match highlighting.Regex Explainer: Paste a regular expression and get a plain-English, token-by-token breakdown of what it matchesOctober 1, 2026 · 3 min read · Use the free Regex Explainer to paste a regular expression and get a plain-English, token-by-token breakdown of what it matches.Random Token Generator: Produce secure random tokens of configurable length and charsetOctober 1, 2026 · 3 min read · Use the free Random Token Generator to produce secure random tokens of configurable length and charset.QR Code Generator: Generate downloadable QR codes from text or URLsOctober 1, 2026 · 3 min read · Use the free QR Code Generator to generate downloadable QR codes from text or URLs.PX to REM Converter: Convert CSS pixels to rem (and back) with a customizable root font sizeOctober 1, 2026 · 3 min read · Use the free PX to REM Converter to convert CSS pixels to rem (and back) with a customizable root font size.PWA Manifest Generator: Build manifest.json and HTML tags to turn your site into an installable Progressive Web AppOctober 1, 2026 · 3 min read · Use the free PWA Manifest Generator to build manifest.json and HTML tags to turn your site into an installable Progressive Web App.PIN Generator: Generate random numeric PIN codes of chosen lengthOctober 1, 2026 · 3 min read · Use the free PIN Generator to generate random numeric PIN codes of chosen length.Password Strength Checker: Estimate password strength and crack time in the browserOctober 1, 2026 · 3 min read · Use the free Password Strength Checker to estimate password strength and crack time in the browser.Password Generator: Generate strong random passwords with adjustable length and character setsOctober 1, 2026 · 3 min read · Use the free Password Generator to generate strong random passwords with adjustable length and character sets.Password Entropy Calculator: Calculate the bits of entropy in a passwordOctober 1, 2026 · 3 min read · Use the free Password Entropy Calculator to calculate the bits of entropy in a password.Passphrase Generator: Build memorable Diceware-style word passphrasesOctober 1, 2026 · 3 min read · Use the free Passphrase Generator to build memorable Diceware-style word passphrases.Number Base Converter: Convert numbers between binary, octal, decimal and hexOctober 1, 2026 · 3 min read · Use the free Number Base Converter to convert numbers between binary, octal, decimal and hex.NTLM Hash Generator: Compute NTLM hashes from password inputOctober 1, 2026 · 3 min read · Use the free NTLM Hash Generator to compute NTLM hashes from password input.Nginx Config Generator: Generate Nginx configs for reverse proxy, SSL termination, static sites and load balancingOctober 1, 2026 · 3 min read · Use the free Nginx Config Generator to generate Nginx configs for reverse proxy, SSL termination, static sites and load balancing.Mock Data Generator: Generate fake users or products as JSON or CSV for API testing and demosOctober 1, 2026 · 3 min read · Use the free Mock Data Generator to generate fake users or products as JSON or CSV for API testing and demos.MD5 Hash Generator: Compute the MD5 hash of any input textOctober 1, 2026 · 3 min read · Use the free MD5 Hash Generator to compute the MD5 hash of any input text.Markdown Preview: Render Markdown to live HTML side by sideOctober 1, 2026 · 3 min read · Use the free Markdown Preview to render Markdown to live HTML side by side.Kubernetes YAML Generator: Generate a linked Deployment, Service and Ingress in one manifest from a simple formOctober 1, 2026 · 3 min read · Use the free Kubernetes YAML Generator to generate a linked Deployment, Service and Ingress in one manifest from a simple form.JWT Signature Verifier: Verify a JWT signature against a provided secret or keyOctober 1, 2026 · 3 min read · Use the free JWT Signature Verifier to verify a JWT signature against a provided secret or key.JWT Decoder: Decode a JWT into its header, payload and signatureOctober 1, 2026 · 3 min read · Use the free JWT Decoder to decode a JWT into its header, payload and signature.JSON Validator: Validate JSON syntax and pinpoint errorsOctober 1, 2026 · 3 min read · Use the free JSON Validator to validate JSON syntax and pinpoint errors.JSON to YAML Converter: Convert between JSON and YAML formatsOctober 1, 2026 · 3 min read · Use the free JSON to YAML Converter to convert between JSON and YAML formats.JSON to CSV Converter: Convert JSON arrays into downloadable CSV filesOctober 1, 2026 · 3 min read · Use the free JSON to CSV Converter to convert JSON arrays into downloadable CSV files.JSON Formatter: Beautify, validate and minify JSON with syntax highlightingOctober 1, 2026 · 3 min read · Use the free JSON Formatter to beautify, validate and minify JSON with syntax highlighting.JSON Diff Checker: Compare two JSON documents with path-level added, removed, and changed highlightsOctober 1, 2026 · 3 min read · Use the free JSON Diff Checker to compare two JSON documents with path-level added, removed, and changed highlights.JavaScript Minifier: Minify JavaScript source to reduce file sizeOctober 1, 2026 · 3 min read · Use the free JavaScript Minifier to minify JavaScript source to reduce file size.IP Subnet Calculator: Calculate network, broadcast, host range and mask from a CIDR block, with a visual bit breakdownOctober 1, 2026 · 4 min read · Use the free IP Subnet Calculator to calculate network, broadcast, host range and mask from a CIDR block, with a visual bit breakdown.IP Address Info & Classifier: Classify an IP as private, public, CGNAT, loopback or reserved with plain-language context and reverse-DNSOctober 1, 2026 · 4 min read · Use the free IP Address Info & Classifier to classify an IP as private, public, CGNAT, loopback or reserved with plain-language context and reverse-DNS.htpasswd Generator: Create Apache/Nginx htpasswd entries with bcrypt or APR1October 1, 2026 · 3 min read · Use the free htpasswd Generator to create Apache/Nginx htpasswd entries with bcrypt or APR1.HTML Minifier: Remove whitespace and comments to shrink HTMLOctober 1, 2026 · 3 min read · Use the free HTML Minifier to remove whitespace and comments to shrink HTML.HTML Encoder/Decoder: Encode and decode HTML entities in textOctober 1, 2026 · 3 min read · Use the free HTML Encoder/Decoder to encode and decode HTML entities in text.HMAC Generator: Compute HMAC signatures with a chosen hash and secret keyOctober 1, 2026 · 3 min read · Use the free HMAC Generator to compute HMAC signatures with a chosen hash and secret key.Hex to RGB Converter: Convert colors between HEX, RGB and HSL formatsOctober 1, 2026 · 3 min read · Use the free Hex to RGB Converter to convert colors between HEX, RGB and HSL formats.Health Check Config Generator: Generate a ready-to-paste health-check script and JSON config for uptime monitors from an endpointOctober 1, 2026 · 4 min read · Use the free Health Check Config Generator to generate a ready-to-paste health-check script and JSON config for uptime monitors from an endpoint.Hash Identifier: Detect the likely hash algorithm from a given hash stringOctober 1, 2026 · 3 min read · Use the free Hash Identifier to detect the likely hash algorithm from a given hash string..gitignore Generator: Merge multiple language, framework and OS templates into one .gitignore, with duplicate patterns removedOctober 1, 2026 · 3 min read · Use the free .gitignore Generator to merge multiple language, framework and OS templates into one .gitignore, with duplicate patterns removed.GitHub Actions Generator: Generate a CI workflow YAML from ready-made Node, Python and Docker templatesOctober 1, 2026 · 3 min read · Use the free GitHub Actions Generator to generate a CI workflow YAML from ready-made Node, Python and Docker templates..env Validator: Validate .env syntax and flag likely leaked secrets and API keys before you commit themOctober 1, 2026 · 3 min read · Use the free .env Validator to validate .env syntax and flag likely leaked secrets and API keys before you commit them.Encryption Key Generator: Generate random AES keys in 128/192/256-bit lengthsOctober 1, 2026 · 3 min read · Use the free Encryption Key Generator to generate random AES keys in 128/192/256-bit lengths.Duplicate File Finder: Find exact duplicate files by content hash locally in your browser, flagging older copies as safe to deleteOctober 1, 2026 · 4 min read · Use the free Duplicate File Finder to find exact duplicate files by content hash locally in your browser, flagging older copies as safe to delete.Data File Merger: Merge multiple JSON, CSV, TSV or XML files into one combined dataset, exportable as JSON or CSVOctober 1, 2026 · 4 min read · Use the free Data File Merger to merge multiple JSON, CSV, TSV or XML files into one combined dataset, exportable as JSON or CSV.curl Command Builder: Build a curl command from a form and export the equivalent Python requests and JS fetch codeOctober 1, 2026 · 4 min read · Use the free curl Command Builder to build a curl command from a form and export the equivalent Python requests and JS fetch code.CSV to JSON Converter: Parse CSV data into structured JSON outputOctober 1, 2026 · 3 min read · Use the free CSV to JSON Converter to parse CSV data into structured JSON output.CSS Minifier: Compress CSS by stripping whitespace and commentsOctober 1, 2026 · 3 min read · Use the free CSS Minifier to compress CSS by stripping whitespace and comments.CSS Gradient Generator: Visually build linear and radial CSS gradients with code outputOctober 1, 2026 · 3 min read · Use the free CSS Gradient Generator to visually build linear and radial CSS gradients with code output.CSRF Token Generator: Generate random anti-CSRF tokens for formsOctober 1, 2026 · 3 min read · Use the free CSRF Token Generator to generate random anti-CSRF tokens for forms.Crontab Builder: Build a cron expression and validate it against a real parser, with the next 5 run times previewedOctober 1, 2026 · 4 min read · Use the free Crontab Builder to build a cron expression and validate it against a real parser, with the next 5 run times previewed.Cron Expression Generator: Build and explain cron schedules with next-run previewOctober 1, 2026 · 3 min read · Use the free Cron Expression Generator to build and explain cron schedules with next-run preview.CRC32 Checksum Generator: Compute CRC32 checksums for text or dataOctober 1, 2026 · 3 min read · Use the free CRC32 Checksum Generator to compute CRC32 checksums for text or data.Chmod Calculator: Compute numeric and symbolic Unix file permissionsOctober 1, 2026 · 3 min read · Use the free Chmod Calculator to compute numeric and symbolic Unix file permissions.Caesar Cipher Tool: Encrypt and decrypt text using a shift-based Caesar cipherOctober 1, 2026 · 3 min read · Use the free Caesar Cipher Tool to encrypt and decrypt text using a shift-based Caesar cipher.Bulk Password Generator: Generate many strong passwords at once for exportOctober 1, 2026 · 3 min read · Use the free Bulk Password Generator to generate many strong passwords at once for export.Bcrypt Generator: Hash passwords with bcrypt and verify them, with adjustable roundsOctober 1, 2026 · 3 min read · Use the free Bcrypt Generator to hash passwords with bcrypt and verify them, with adjustable rounds.Base64 Hash Generator: Hash input and output the digest in Base64 formOctober 1, 2026 · 3 min read · Use the free Base64 Hash Generator to hash input and output the digest in Base64 form.Base64 Encoder/Decoder: Encode and decode text and files to and from Base64October 1, 2026 · 3 min read · Use the free Base64 Encoder/Decoder to encode and decode text and files to and from Base64.Backup Script Generator: Generate a cron-ready database backup script for Postgres, MySQL or MongoDB, with an optional S3 uploadOctober 1, 2026 · 4 min read · Use the free Backup Script Generator to generate a cron-ready database backup script for Postgres, MySQL or MongoDB, with an optional S3 upload.Argon2 Hash Generator: Hash passwords with Argon2id, with tunable parametersOctober 1, 2026 · 3 min read · Use the free Argon2 Hash Generator to hash passwords with Argon2id, with tunable parameters.API Key Generator: Generate random API keys and secret tokensOctober 1, 2026 · 3 min read · Use the free API Key Generator to generate random API keys and secret tokens.AES Text Encrypt/Decrypt: Encrypt and decrypt text with AES-GCM and a passphrase, fully client-sideOctober 1, 2026 · 3 min read · Use the free AES Text Encrypt/Decrypt to encrypt and decrypt text with AES-GCM and a passphrase, fully client-side.

How to use 542+ tools on this site

Each tool is a separate page. The title is the task, the sentence under the title is the scope, and the form is the product. Type the text, choose the file, or enter the numbers you already have. The result stays on that page. You can change one field and compare a second case without starting over.

480 tools run in the browser. The file or the figures stay on your device, which is why those pages are marked private. They work without an account. AI writers and handwriting OCR send the input to a server so a model can run, and the page says so. The free plan includes a small daily limit for those server tools. Pro removes the limit. Do not paste passwords or account numbers into a server tool.

Search from the header when you know the tool name. Open a category when you only know the kind of job. Calculator pages are estimates: a payment, a yard of concrete, or a calorie figure is only as good as the rate, the unit, and the date you typed. PDF and image pages follow the file you upload. If the page never mentions a rule that applies to your bank, school, clinic, or city, treat the output as a draft and check the source that actually governs the decision.

Read the notes under the form before you rely on a number. They repeat the scope, the steps, and the questions people ask. Related tools sit at the bottom when the next step is a different calculation or a different file. The categories below are the whole library.

AI-Powered Tools. AI assistants for developers and job seekers — explain code, generate SQL, write cover letters and interview answers, check résumés for ATS, debug errors, commits, PRs, docs and tests. AI assistants for developers & job seekers. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Handwriting OCR. AI-powered handwriting tools — OCR in 30+ languages, form & table extractors, math to LaTeX, Markdown conversion, and note summarizers. Upload a photo and get editable digital text. OCR, forms, tables, math & notes. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Freelancer Tools. Free client-side tools for freelancers — contracts, proposals, NDAs, rate calculators, quotes, and change orders. No signup, no subscription. Contracts, rates & client docs — free. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

DevOps Tools. Client-side generators and validators for infrastructure, CI/CD and networking — configs, manifests and scripts you can copy straight into your project. Configs, manifests & scripts. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Health & Fitness. Free health and fitness calculators — hydration, macros, heart-rate zones, training and more. Instant, private and running entirely in your browser. Fitness, nutrition & wellbeing. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Text Tools. Browser-based utilities for counting, converting, cleaning, and transforming text. Write, clean & transform text. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Developer Tools. Client-side coding utilities for formatting, converting, encoding and inspecting data. Format, convert & debug code. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Security & Password Tools. Privacy-first, in-browser tools for passwords, hashing, encryption and key generation. Passwords, hashing & crypto. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

PDF Tools. Browser-based tools to merge, split, convert, compress, and edit PDF files. Merge, split & convert PDFs. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Image Tools. Browser-based tools to convert, resize, compress, crop, and edit images. Resize, compress & convert images. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Color Tools. Browser-based color pickers, converters, palette and gradient generators. Pick, convert & build palettes. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Calculators. Financial, health, math, date and everyday calculators that run entirely in the browser. Finance, health & math. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Unit Converters. Instant client-side converters for length, weight, volume, temperature, and other measurement units. Convert any unit instantly. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

SEO & Web Tools. Comprehensive SEO suite — keyword research, technical audits, content optimization, rank tracking, backlinks, internal linking, schema, and AI SEO workflows. Research, audits, schema & AI SEO. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Social Media Tools. Client-side helpers for crafting, styling, and mocking up social media content and posts. Captions, fonts & mockups. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Content Creator Tools. Free browser tools for YouTubers, podcasters & social creators — video editing, script extraction, voiceovers, captions & more. No signup for browser tools; AI script studio uses daily free runs. Video editor, script studio & voiceovers. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Converters & Generators. Client-side data converters and utility generators for developers, students, and everyday users. Data converters & generators. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Home & Trade Calculators. Free home, workshop, electrical, and property calculators — BTU, AC tonnage, lumber, deck, voltage drop, refinance, rental cash flow, and more. Runs in your browser. Home, workshop, electrical & property. Open that category and read the line under each tool name before you click. The line is the job the tool actually does.

Pick the tool whose description matches the input you have. If the description does not mention that input, it is the wrong page. Run the form, read the result next to the labels, and only then copy it into a document, a message, or a spreadsheet.

How to read a result

A calculator answers the question printed on the page. A mortgage page returns principal, interest, tax, and insurance when you enter those amounts. It does not know your lender’s fees, your credit score, or a rate that changes next month. Change the rate, the term, or the down payment and read the new payment next to the old one before you decide. The same habit works for a loan, a retirement contribution, a paint job, or a calorie target: one input at a time, then the line that moved.

Units are part of the answer. A length converter shows both sides of the pair you picked. A concrete page asks for feet or metres because a yard of concrete is a volume, not a length. If the label says per month, do not type a yearly figure in that box. Dates matter on age, pregnancy, countdown, and interest pages: the day you enter is the day the formula uses. Round only after you have the full figure, and keep the same rounding when you compare two cases.

File tools follow the file. A PDF merge keeps page order as you arranged the files. Split and extract keep the pages you selected. Compress makes the file smaller and can soften images inside it. Rotate, crop, watermark, and page numbers change the pages you see, not the words in a scanned image unless the page says it runs OCR. An image resizer changes pixels. A format converter changes the container. Download the result and open it before you send it. If the preview looks wrong, the source file is still on your device and you can run the tool again.

Text tools work on the text in the box. A counter reports words, characters, and sentences for that box only. Case, find-and-replace, and duplicate-line tools rewrite that box. They do not open a document on your computer until you paste. JSON, CSV, and code formatters expect valid input; an error line means the text is not in the shape the tool described. Fix the text or pick the converter that matches the format you actually have.

Search opens a list of every tool name and its one-line description. Type the job, not a slogan: mortgage, merge pdf, word counter, bmi. The match is the name and the description, so a short specific phrase finds the page faster than a long sentence. Category menus are the same library grouped by the kind of work. A tool that is not built yet is marked soon and does not pretend to calculate.

The guide under each tool is the place to check limits. It names the inputs, what the formula leaves out, and the questions people ask before they use the number. Related links are the next tool when the job continues, such as a payment after a loan amount, or a JPG after a PDF page. The blog explains one job in a longer article and links to the tool that does the work. Use the article when you want the reasoning, and the tool when you already have the figures.

Browser tools need a current browser and JavaScript. A very large PDF or image can be slow because it is processed on your machine. Server tools need a connection and count toward the free daily limit. Create an account only if you want that limit lifted. The result on a private page is not stored by the site. Copy what you need, then close the tab if the file was sensitive.