Free Developer Tools — No Signup, All Browser-Based
Every tool processes data entirely client-side. No data leaves your device. Used by software engineers, QA testers, technical writers, and students for daily development workflows.
JSON Formatter & Validator
Parse, validate, and beautify JSON with syntax highlighting and error detection. Supports minification, tree-view navigation, and large file handling. Essential for API testing, config file editing, and data debugging.
Base64 Encoder / Decoder
Converts text, images, and binary data to/from Base64 encoding (RFC 4648). Supports UTF-8, data URIs for HTML/CSS embedding, and MIME type detection. Commonly used for email attachments, API payloads, and inline web assets.
Additional Tools
Word Counter with paragraph/character/sentence analysis; Color Picker with HEX/RGB/HSL conversion and accessibility contrast checking; URL Encoder/Decoder for query parameter handling; Markdown Preview with GitHub-flavored rendering. All tools work offline after page load.
Built with vanilla JavaScript. No frameworks, no tracking, no server-side processing. Your code and data remain on your machine.
Free Developer Tools — No Signup, All Browser-Based
Every tool processes data entirely client-side. No data leaves your device. Used by software engineers, QA testers, technical writers, and students for daily development workflows.
JSON Formatter & Validator
Parse, validate, and beautify JSON with syntax highlighting and error detection. Supports minification, tree-view navigation, and large file handling. Essential for API testing, config file editing, and data debugging.
Base64 Encoder / Decoder
Converts text, images, and binary data to/from Base64 encoding (RFC 4648). Supports UTF-8, data URIs for HTML/CSS embedding, and MIME type detection. Commonly used for email attachments, API payloads, and inline web assets.
Additional Tools
Word Counter with paragraph/character/sentence analysis; Color Picker with HEX/RGB/HSL conversion and accessibility contrast checking; URL Encoder/Decoder for query parameter handling; Markdown Preview with GitHub-flavored rendering. All tools work offline after page load.
Built with vanilla JavaScript. No frameworks, no tracking, no server-side processing. Your code and data remain on your machine.
Free Online Developer Tools — JSON, Base64, Word Counter & More
JSON Formatter
Base64 Encoder/Decoder
Word Counter
| Char | Distribution | Count |
|---|---|---|
| Start typing to see statistics | ||