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Formatters, generators, converters, cheatsheets, calculators and more — all free, right in your browser.
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Popular Tools
JSON Formatter & Validator
Format, validate and minify JSON online for free. Paste your JSON and get a readable version instantly.
Regex Tester & Debugger
Free online regex tester. Test regular expressions in real time with highlighted matches, captured groups, and match details.
UUID/GUID Generator
Free online UUID/GUID generator. Create random v4 UUIDs in bulk and validate existing UUIDs instantly.
Base64 Encoder & Decoder
Encode and decode Base64 strings online for free. Supports UTF-8.
Password Generator
Generate secure random passwords online for free. Configure length, uppercase, numbers and symbols.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. See the current timestamp in real time.
HTML Minifier
Minify HTML by removing comments, whitespace and unnecessary line breaks.
Color Contrast Checker
Check color accessibility according to WCAG 2.0 guidelines.
Docker Cheatsheet
Quick reference of Docker commands with search and category filter.
JWT Decoder
Decode JWT tokens online for free. View header, payload and signature.
QR Code Generator
Generate QR codes from text or URLs online for free.
Crontab Expression Parser
Free online crontab parser. Convert cron expressions to human-readable descriptions with presets for common schedules.
Categories
Encoders & Decoders
Base64, URL, HTML entities, JWT and more
10 tools
Code Formatters
JSON, SQL, CSS, XML, HTML
12 tools
Generators
UUID, QR Code, passwords, Lorem Ipsum
21 tools
Converters
Timestamp, colors, CSV, YAML, Markdown
29 tools
Text Tools
Diff, regex, fancy text, case converter
19 tools
Crypto & Hashing
Hash MD5/SHA, HMAC, encrypt/decrypt
8 tools
Network Tools
IP, subnet, HTTP status codes
8 tools
Media Tools
Image editing, PDF tools, SVG conversion
6 tools
Dev Reference
Crontab, chmod, MIME types, HTTP headers
20 tools
Math & Calculators
Calculator, percentages, statistics
6 tools
Date & Time
Stopwatch, pomodoro, date calculator, age
15 tools
Finance Calculators
Savings, loan, and investment calculators
5 tools
Fun & Games
Raffle, dice, spinner, typing test, drawing
13 tools
What is PureTools?
PureTools is a collection of free online tools for developers, IT professionals and anyone who needs to solve quick tasks. From code formatters (JSON, SQL, HTML, CSS, JavaScript, TypeScript, GraphQL, PHP, Python) to config file generators (Dockerfile, .gitignore, robots.txt, nginx), converters (JSON to CSV, XML to JSON, Markdown to HTML), comprehensive cheatsheets (Docker, Linux, SQL, Regex, Tailwind, Python) and security tools (RSA generator, TOTP, hashes, AES encryption).
Why use PureTools?
- All tools run 100% in the browser — your data is never sent to external servers
- No extensions, apps or account needed
- Clean and fast interface, no pop-ups or intrusive ads
- Available in English, Português and Español
- Open source and constantly growing with new tools
Who is it for?
- Front-end and back-end developers who need to format, convert or generate code quickly
- DevOps and SREs working with Docker, Nginx, cron and server configurations
- Programming students using cheatsheets as quick references
- Professionals who need calculators, unit converters or document generators