Free Developer Web Tools
19 browser-based tools. No signup, no tracking, works offline.
JSON Formatter • Regex Tester • UUID Generator • Hash Generator • QR Code • and more
Pomodoro Quest
Gamified Pomodoro timer. Level up by focusing. Earn badges and track progress.
JSON Formatter
Format, minify, and validate JSON. Tree view, syntax highlighting, and history.
Regex Tester
Test regular expressions in real-time. Capture groups, replace, and presets.
Base64 Encoder
Encode/decode text, images, and files to Base64. Drag & drop support.
Diff Tool
Compare two texts and visualize differences. Side-by-side and inline views.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or files.
UUID Generator
Generate and validate UUIDs. Bulk generation, format options, and history.
Timestamp Converter
Convert Unix timestamps to dates and vice versa. Timezone and relative time support.
URL Encoder
Encode and decode URLs. URL parser and query builder included.
CSS Gradient
Generate CSS gradients visually. Linear, radial, and conic gradients with presets.
Color Converter
Convert colors between HEX, RGB, HSL, RGBA. Auto-generate related colors.
Lorem Ipsum Generator
Generate placeholder text. Paragraphs, sentences, or words with preview.
Character Counter
Count characters, words, lines, and more. Japanese text analysis included.
Password Generator
Generate secure passwords with Web Crypto API. Strength indicator included.
Markdown Preview
Real-time Markdown preview with split pane. Copy HTML output.
HTML Escape
Escape and unescape HTML entities in real-time. Swap input/output.
Image to Base64
Convert images to Base64. Outputs Data URI and CSS background-image formats.
QR Code Generator
Generate QR codes from text or URLs. Customize size and colors, download as PNG.
JSON to CSV
Convert between JSON and CSV formats. Supports delimiter options and downloads.