HTML Tools
Simple, focused utilities that run entirely in your browser — no installs, no servers, no tracking.
JSON Formatter
Prettify, minify, and validate JSON with syntax highlighting.
JSON to TypeScript
Convert JSON objects into TypeScript interface definitions.
JSON Diff
Compare two JSON objects and highlight the differences.
JSON Sort
Sort JSON keys alphabetically or by preset (package.json, tsconfig, composer).
JSON ↔ CSV
Round-trip JSON and CSV with smart type inference and delimiter detection.
JSON ↔ YAML
Round-trip JSON and YAML with anchor resolution and multi-document support.
JSON to Validator Schema
Generate Zod, Valibot, or Yup schemas from a JSON sample.
Regex Tester
Test JavaScript regular expressions live with capture-group breakdown.
SVG to JSX
Convert SVG markup into React JSX-compatible component code.
SVG to Raster
Rasterize an SVG to PNG, JPEG, or WebP at any pixel size — preset sizes, aspect lock.
Cron Decoder
Decode a cron expression into plain English and preview the next 10 run times.
Code Snippet to Image
Turn code into a sharable PNG card with VS Code-grade syntax highlighting.
Text Diff
Compare two plain-text blocks line-by-line with word-level inline highlighting.
Markdown Preview
Live Markdown editor with GFM support — tables, task lists, strikethrough.
SemVer Checker
Check if a version satisfies a range — ^, ~, hyphen, wildcard, and more.
JWT Decoder
Decode JWT header, payload, and signature — timestamps shown as human-readable dates.
Image Compressor
Compress PNG, JPEG, WebP, and AVIF images — quality presets or target size in KB.
Image Resizer
Batch-resize images by percentage, exact size, or max dimensions — social-card presets.
Image Cropper
Crop a region — rectangle or circle, drag the box, lock an aspect ratio.
Image Format Converter
Convert images between PNG, JPEG, WebP, and AVIF with a quality slider and before/after diff.
Image Watermark
Stamp a text or image watermark onto photos — position, opacity, rotation, tiling.
QR Code Generator
Turn any text, URL, WiFi config, or vCard into a QR code — export as SVG or PNG.
Lorem Ipsum Generator
Generate placeholder text — paragraphs, sentences, words, or list items, with flavored dictionaries.
Avatar Generator
Generate an initial-based avatar from a name — choose shape, style, and export as PNG.
Favicon Generator
Drop an image or pick an emoji to generate a full favicon set — PNG, ICO, maskable, manifest.
UUID Generator
Generate UUID v4 (random) or v7 (time-ordered) in bulk — copy individually or as a list.
Wheel of Names
Add names, spin the wheel, and let chance decide — remove winners for elimination-style draws.
PDF Merger
Combine multiple PDFs into one — reorder pages, pick page ranges, add bookmarks.
Image to PDF
Combine PNG, JPEG, or WebP images into a single PDF — page size, fit, margin, drag-to-reorder.
PDF Compressor
Shrink PDFs in-browser by re-encoding embedded JPEG images — text stays selectable.
PDF Splitter
Extract selected pages into one PDF or split to per-page files as a zip.
PDF Page Manager
Reorder, rotate, and delete PDF pages — text stays selectable, undo/redo included.
PDF Watermark
Stamp a text or image watermark onto PDF pages — position, opacity, rotation, tiling.
PDF Signature
Draw, type, or upload a signature and stamp it onto any page of a PDF.
PDF to Image
Rasterise PDF pages to PNG, JPEG, or WebP at 72–300 DPI — select pages, download individually or as a zip.
Why HTML Tools
Built for speed, privacy, and simplicity.
Privacy first
Nothing leaves your device. Your data is processed locally — never sent to any server.
Instant results
No round trips, no loading spinners. Everything runs at native browser speed, offline-capable.
Zero install
Open a URL, start working. No npm, no Docker, no account — just a browser.
Focused tools
Each tool does one thing well. No bloat, no distractions — just the feature you need.