The Developer's Online Toolkit
Stop installing CLI tools for quick tasks. These browser-based developer tools handle everyday data operations instantly.
Data Formatters
Beautify or minify your data:
- JSON Formatter — format, validate, and minify JSON
- XML Formatter — pretty-print XML documents
- YAML Formatter — validate and format YAML
- SQL Formatter — beautify SQL queries
Code Beautifiers
Clean up messy code:
- HTML Beautifier — format or minify HTML
- CSS Beautifier — format or minify CSS
- JS Beautifier — format or minify JavaScript
Format Converters
Switch between data formats:
| From | To | Tool |
|---|---|---|
| CSV | JSON | CSV to JSON |
| JSON | CSV | JSON to CSV |
| JSON | YAML | JSON to YAML |
| YAML | JSON | YAML to JSON |
| CSV | TSV | CSV to TSV |
| TSV | CSV | TSV to CSV |
| Markdown | HTML | MD to HTML |
| HTML | Markdown | HTML to MD |
- Base64 Encode/Decode — encode and decode Base64 strings
- URL Encode/Decode — handle URL-safe encoding
- Hash Generator — generate MD5, SHA-1, SHA-256, SHA-512 hashes
Identity & Auth Tools
- UUID Generator — generate v4 UUIDs for databases and APIs
- JWT Decoder — decode and inspect JSON Web Tokens without a library
- Unix Timestamp Converter — convert between timestamps and human dates
Regex Tester
The Regex Tester lets you:
- Write and test regular expressions in real-time
- See all matches highlighted
- Test against sample text
- Copy the regex pattern for use in your code
Why Browser-Based?
All these tools run entirely in your browser. No data is sent to any server, making them safe for production data, API keys, and sensitive configurations.

