ClearEvo Online Tools

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ClearEvo online tools - free tools that run 100% in your browser, no install, no account, and your data is never uploaded (Google Analytics for visit stats only - verify it yourself).

  • DICOM Viewer · how to use → - free online DICOM viewer: open a zip of your MRI, CT or ultrasound scan CD right in the Chrome browser on your tablet, phone or desktop: series browser, slice scrolling, window/level presets, measure/angle, ultrasound cine clips, tags, JPEG 2000/RLE CDs, Simple and Advanced (PACS) modes, EN/ไทย. Reads gigabyte CDs slice-by-slice and your medical images are never uploaded - try the author’s own anonymized demo scans (150 MB demo: a real SCDS ear CT).

  • 🛰 GNSS Monitor · how to use → - live GPS/GNSS viewer for external Bluetooth and USB receivers: satellite sky plot, per-satellite signal bars, NMEA decode plus u-blox UBX framing with NAV-PVT decode. Works on Android phones (Chrome) and desktop.
  • HyperTerminal online · how to use → - the long-lost Windows serial terminal, reborn on the Web Serial API: COM properties, capture to file, send text file.
  • 📶 AT Command Tester · how to use → - talk to GSM/LTE modems and IoT modules: click-to-send command catalog, script runner, parsed signal/registration status.
  • 🔢 Hex Editor · how to use → - free online hex editor: open any file, edit bytes in place, search by hex, text, numbers (u8..i64, little/big endian) or bit sequences at any bit offset.
  • 🌍 GIS Converter (Shapefile, GeoJSON, KML, GPX) · how to use → - GDAL ogr2ogr compiled to WebAssembly: convert Shapefile, GeoJSON, GPX, KML/KMZ, GeoPackage, CSV, DXF, FlatGeobuf and more, with optional EPSG reprojection - your survey data is never uploaded.
  • 🔳 Free QR Code Generator · how to use → - your URL/WiFi/contact is encoded directly into the QR: no redirect through anyone’s server, so it never expires and can’t be paywalled later. PNG and SVG export, UI in 12 languages (English, ไทย, 中文, all ASEAN, Español, Português).
  • 🎵 Audio Converter (MP4 to MP3) · how to use → - ffmpeg compiled to WebAssembly: extract audio from video (MP4→MP3), convert between MP3, WAV, FLAC, OGG, Opus, M4A - recordings stay on your machine. Honest limit: ~10-20x slower than desktop ffmpeg, 500 MB cap.
  • 🩺 doctor · how to use → - the classic Emacs ELIZA psychotherapist: reach your own answer, no AI needed.
  • 🧮 calc · how to use → - Emacs-style RPN stack calculator with the bindings your fingers remember.
  • 🔍 isearch · how to use → - Emacs-style incremental search over any pasted text or file.

Every tool is free software and open source - the GitHub repo is linked from each tool’s “How to use” guide. Feedback and bug reports are very welcome: comment on the how-to posts or open an issue on the repo.

Full disclosure: this post - and any code or tool it describes - was co-authored with Claude (Anthropic’s AI, via Claude Code). I directed, guided and reviewed. I don’t want to pretend otherwise.