Code tools
Ten instant developer utilities that run entirely in your browser — format snippets, explore regex, build CSS layouts, generate placeholders, and look up references without installing anything.
100% client-side · no upload · no tracking
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Code Snippet Formatter
Paste HTML, CSS, or JavaScript and get cleanly indented, formatted output in one click.
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Regex Cheat Sheet
Interactive regular expression reference — click any pattern to copy it, with a live test input.
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CSS Grid Builder
Visually configure a CSS Grid layout and copy the generated CSS — columns, rows, gap, and placement.
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CSS Flexbox Builder
Set flexbox container and item properties visually, preview the result, and copy the CSS.
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CSS Breakpoint Tester
See which CSS breakpoint is active at the current viewport width — Tailwind, Bootstrap, or custom.
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Lorem Image URL Builder
Generate placeholder image URLs from Picsum, Placehold.co, and via.placeholder with custom sizes.
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Placeholder Image Generator
Generate a placeholder image at any size with custom colors and label text — download as PNG.
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Emoji Cheat Sheet
Browse and search all standard emoji with Unicode codepoints and HTML entities. Click to copy.
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ASCII Table
Full ASCII character table with decimal, hex, octal, binary, and HTML entity values. Click to copy.
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HTTP Methods Reference
Quick reference for HTTP methods (GET, POST, PUT, PATCH, DELETE) with semantics and common status codes.
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Barcode Generator
Generate Code128, EAN-13, UPC-A, and Code39 barcodes as SVG/PNG entirely in your browser.
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Why browser-only code tools?
Pasting code snippets, tokens, or API payloads into third-party websites is a security risk. These tools run entirely inside your browser — your code never leaves your device, there is no server, and no data is logged. Use them freely on any network, including air-gapped machines.