Developer Tools
Everyday utilities for people who write and debug code: generate identifiers, inspect tokens, test patterns and format snippets. They suit backend and frontend developers, DevOps engineers and QA testers who want a quick answer without installing anything or pasting secrets into a server.
38 tools
Popular tools
JWT Decoder
Paste a JWT to read its header and payload as formatted JSON, with issue, not-before and expiry times translated to real dates. Decoding is not verification.
Developer Tools
UUID Generator
Create one or thousands of universally unique identifiers in any version, formatted exactly the way your code or database expects.
Developer Tools
Regex Tester
Write a pattern, paste some text and see every match highlighted, with its position and capture groups.
Developer Tools
Password Generator
Create strong, truly random passwords with the character sets you choose. Nothing is sent or saved.
Developer Tools
URL Parser
Paste a URL and see every component separately, with the query parameters decoded in a table.
Developer Tools
UUID v4 Generator
Get random version 4 UUIDs, the everyday choice for unique IDs when you do not need ordering or repeatability.
Developer Tools
All tools in this category
- JWT Decoder
- UUID Generator
- Password Generator
- Regex Tester
- URL Parser
- UUID v4 Generator
- Base Converter (Base 2 to 36)
- UUID v7 Generator
- UUID Validator & Version Detector
- JWT Inspector
- UTM Builder
- UUID v5 Generator (Name-Based)
- HTML Formatter
- JWT Expiration Checker
- Query String Parser
- Decimal to Binary Converter
- Random Number Generator
- Regex Match Extractor
- URL Slug Generator
- Binary to Decimal Converter
- Decimal to Hex Converter
- Regex Replace
- Remove URL Parameters
- Hex to Decimal Converter
- Binary to Hex Converter
- Extract Domain from URL
- Query String Builder
- Hex to Binary Converter
- HTML Minifier
- Random String Generator
- AES Encrypt (AES-256-GCM)
- HTML to Text Converter
- Regex Escape
- AES Decrypt (AES-256-GCM)
- Random List Picker
- Strip HTML Tags
- PBKDF2 Key Derivation Generator
- Random Bytes Generator
Frequently asked questions
Does the JWT decoder verify the token signature?
No. Decoding only reads the header and payload, which are plain Base64URL-encoded JSON. Anyone can produce a token that decodes correctly, so never trust decoded claims until the signature has been verified on your server.
Are the UUIDs generated here random enough for production?
Version 4 UUIDs use your browser's cryptographically secure random generator, which is suitable for identifiers. They are not secrets, though, so do not use a UUID as a password or API key.
Is it safe to paste real tokens or configuration into these tools?
The processing happens in your browser tab and nothing is sent to our servers. Even so, treat production credentials carefully: prefer test values, and revoke any token you pasted into a shared or untrusted computer.