Free Tools for Developers
Browser-based utilities — no login, no server, no data sent anywhere. Everything runs in your browser.
JSON Formatter
Paste raw JSON and instantly get it formatted, validated, and colorized — no server required.
Open →FreeBase64 Encoder / Decoder
Encode text or URLs to Base64, or decode Base64 strings back to plain text in your browser.
Open →FreeJWT Decoder
Paste any JWT token to see the decoded header, payload, and expiry — everything client-side.
Open →FreeRegex Tester
Write a regex pattern, set flags, and see matches highlighted in your test string in real time.
Open →FreeTimestamp Converter
Convert Unix timestamps (seconds or ms) to human dates and back — all formats at once.
Open →FreeCSS Units Converter
Convert between px, rem, em, %, pt, vw and vh. Configure base font size and viewport size.
Open →FreeMarkdown Previewer
Write Markdown and see a live rendered preview side-by-side. Supports GFM tables and code blocks.
Open →FreeColor Palette Generator
Pick any color and get tints, shades, complementary, triadic, and analogous palettes with CSS variables.
Open →More tools coming soon — AI Prompt Card Generator, Error Explainer, GitHub Profile Card, and more.