Small tools, sharp edges.
A growing collection of fast, focused web utilities. Built in the browser, hosted on the edge, free to use. New tiles light up as tools ship.
JSON Formatter
Pretty-print, minify, and validate JSON — entirely in the browser.
OpenColor Picker
Pick, convert between formats, and check WCAG contrast in real time.
OpenRegex Tester & Builder
Live match highlighting with a guided pattern generator beside it.
OpenMarkdown Preview
Live GFM preview, or import HTML/CSV/JSON/DOCX/XLSX/PDF/PPTX and convert to Markdown.
OpenMulti-Encoder
Convert text between Base64, Hex, URL, Binary, and ASCII fluidly.
OpenJWT Decoder
Inspect headers, payload, and signature locally — nothing leaves the page.
OpenVideo Studio
Compress, trim, reverse, resize, crop, rotate and re-encode — CRF/bitrate, frame-dropping, MP4/MKV/MOV/WebM, GIF, PNG frames or audio, in the browser via ffmpeg.wasm.
OpenUUID & Hash Generator
UUID v4/v7 plus MD5, SHA-1, SHA-256, and SHA-512 hashes on demand.
OpenQR & Barcode Generator
Every 1D & 2D symbology, full design control, ECC levels, multi-format export.
OpenOG Image Studio
Compose 1200×630 social cards via the edge — title, subtitle, theme, instant preview.
OpenFlipper GUI Studio
Drag-and-drop visual editor for Flipper Zero / Momentum apps. Multi-screen, button transitions, exports as C.
OpenMetadata Studio
Inspect, edit, strip, and extend metadata in any file — EXIF, ID3, PDF info, Office props, ZIP entries.
OpenMIUI Theme Studio
Build & edit MIUI / HyperOS themes for the Xiaomi 14T Pro — wallpapers, icons, fonts, boot animation, system colors. Exports a ready-to-install .mtz.
OpenYouTube MP3 Studio
Build a yt-dlp command for max-quality MP3 — videos, playlists, even private ones. Sign in to grab your Liked videos, cookie-free.
OpenHTML Builder
Design web pages visually — drag elements, style every property, add no-code interactions, export clean HTML/CSS/JS.
OpenCookies.txt Converter
Convert a browser cookie export into a yt-dlp-ready Netscape cookies.txt — entirely in the browser.
OpenCircuit Simulator
Build high quality circuit diagrams with instant error feedback and live DC simulation.
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