Free Developer Tools
Simple, fast, privacy-first tools for everyday development tasks. No signup, no ads, all processing happens in your browser.
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Markdown to HTML
Write Markdown on the left, see rendered HTML on the right. Copy raw HTML or download as a complete file.
Markdown • HTML • PreviewURL Encoder & Decoder
Encode special characters for safe URLs or decode percent-encoded strings back to readable text.
URL • Encode • DecodeBase64 Encoder & Decoder
Convert text to Base64 or decode Base64 back to plain text. Full UTF-8 support including emoji.
Base64 • Encode • DecodeColor Converter
Convert between HEX, RGB, HSL, and CMYK formats. Interactive color picker with live preview.
Color • HEX • RGB • HSLTimestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds.
Unix • Epoch • TimestampJSON Formatter & Validator ↗
Format messy JSON instantly with syntax highlighting and error detection. Copy or download cleaned output.
JSON • Format • ValidateAd Space — Replace with AdSense