Small tools.
Big time savings.
A practical toolbox for developers and problem-solvers. Format JSON, compare text, encode URLs, decode Base64, and test regex — right in your browser.
The toolbox
The right tool for the task.
Focused utilities that do one job well, with clear controls and no account required.
JSON Formatter & Validator
Format, validate and inspect JSON with clear syntax errors.
Open toolText Diff Checker
Compare two text blocks and spot added or removed lines.
Open toolBase64 Encoder & Decoder
Encode or decode Base64 text with Unicode support.
Open toolURL Encoder & Decoder
Encode URL components and decode percent-encoded text.
Open toolRegex Tester
Test regular expressions, flags and matches against sample text.
Open toolUUID Generator
Generate random UUID v4 identifiers in bulk, instantly.
Open toolSHA Hash Generator
Create SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text.
Open toolJWT Decoder
Decode JSON Web Token headers and payloads and check expiry.
Open toolUnix Timestamp Converter
Convert Unix epoch time to readable dates and back.
Open toolPassword Generator
Generate strong random passwords with entropy estimates.
Open toolColor Converter
Convert HEX, RGB and HSL colors and check text contrast.
Open toolSimple by design
Useful tools, without the friction.
Open a tool, enter your data, and get a result. No account or setup required.
Quick to use
Focused interfaces help you complete common tasks without navigating a complicated app.
Browser-first approach
The included tools process inputs locally where practical. Avoid entering secrets into any online tool.
Made for real tasks
Helpful defaults, clear error messages, and straightforward output controls.
Learn as you go
Practical guides, not guesswork.
Understand the concepts behind the tools and avoid common mistakes.
How to Format and Validate JSON
Learn what JSON formatting does, how to validate JSON, and how to understand common syntax errors.
Read guide Guide 02Base64 Encoding and Decoding Explained
Understand Base64, common use cases, Unicode text, and why encoding is not encryption.
Read guide Guide 03URL Encoding: A Practical Guide
Learn percent encoding, URL components, reserved characters, and safe decoding.
Read guide Guide 04How to Compare Two Text Files
Compare text, understand line-based diffs, and find changes between versions.
Read guide Guide 05Regular Expressions for Beginners
Learn regex patterns, character classes, quantifiers, flags, and practical examples.
Read guide Guide 06What Is a UUID? Versions, Formats and Best Practices
Understand UUID structure, the difference between v1, v4 and v7, collision odds, and database tips.
Read guide Guide 07Hash Functions Explained: SHA-256, SHA-1 and Beyond
Learn what cryptographic hashes are, how SHA algorithms differ, and when not to use them.
Read guide Guide 08JSON Web Tokens (JWT) Explained
How JWTs are structured, signed and verified, common claims, and security pitfalls to avoid.
Read guide Guide 09Unix Timestamps: A Complete Guide
What epoch time is, seconds vs milliseconds, time zones, the 2038 problem, and code examples.
Read guide Guide 010How to Create Strong Passwords
Password entropy, length versus complexity, passphrases, and how password managers help.
Read guide Guide 011HEX, RGB and HSL Colors Explained
Understand web color formats, how to convert between them, and how to meet contrast guidelines.
Read guideReady when you are
Get back to the work that matters.
Pick a tool and finish your task in a few steps.