Android
The whole workbench, on your phone.
Download public videos over your own connection, convert media, read and edit PDFs, and transcribe speech. The heavy tools run on the device, so your files stay on it.
Version 1.17 · Android 8 and up · about 99 MB · not on the Play Store
Tap a screen to enlarge, then use the arrow keys.
What it does
Downloads over your own IP
yt-dlp runs on the phone, so a public video is pulled over your connection, not a shared server. Pick a resolution, the audio, subtitles, or a section. A download keeps running when you leave the app and is waiting for you when you come back.
View and edit files on the phone
Images, PDFs, and audio conversion run on the phone with a bundled ffmpeg. Text and code files, txt, md, json, xml, yaml, toml, html, csv, and more, open in a viewer that also edits and saves, all on-device.
Open with Cyber24
From any file manager, open a supported file, an archive, an APK, or an Office document straight into the matching tool.
Archives
Open zip, 7z, tar, tar.gz, gz, and rar. Pick specific files and extract only those to a folder you choose, or repack a selection into a new zip, 7z, or tar. A rar cannot be recreated, so it repacks to one of the other formats.
Inspect and unpack an APK
Read an app package's name, version, permissions, and contents, and pull individual files out of it.
Office documents
Word, Excel, and PowerPoint files view as PDF, convert, or edit through the server, where LibreOffice does the conversion. Excel and CSV edit in a grid, Word edits the text, PowerPoint is view and convert only. The layout is re-rendered by the converter, not kept pixel for pixel.
Share the result
Image, audio, video, and GIF results go straight to Android's share menu, to any app that takes them.
Transcription
Turn speech into text, tuned for Bengali, Hindi, and English, with SRT, VTT, and plain text out.
No account, nothing kept
Open a tool, use it, keep the result in Downloads/Cyber24. Signing in is optional and only unlocks role features.
Installing it
- 01Download the APK below. It is about 99 MB, since yt-dlp and ffmpeg are bundled.
- 02Open it. Android asks to allow installs from your browser or files app; allow it once.
- 03Install, then open Cyber24. The app is signed with the same key across releases, so updates install over the top.
Sideloading is normal for an app that is not on the Play Store. The APK is signed by the same key every release. Prefer the browser? Every tool also runs at cyber24.dev/tools.