SubGHz-RAW-Edit
A tiny on-device waveform editor for Flipper Zero that trims RAW .sub captures down to just the part you care about.
A Flipper Zero app that cleans up raw radio signal recordings by trimming silence, repeated copies, and noise, so you get one clean signal burst ready for replay or analysis, all without a computer.
SubGHz-RAW-Edit is an app for the Flipper Zero, a small handheld device known for capturing and replaying wireless signals. This app focuses on one specific problem: when you record a radio signal with the Flipper's built-in "Read RAW" feature, the resulting file is usually a long stream that includes lots of silence, repeated copies of the same signal, and background noise. Most decoders and replay tools work best with a single clean copy of the actual signal, so cleaning up those recordings by hand is tedious. This app lets you do that trimming directly on the device without needing a computer.
When you open a recording in the app, it automatically scans the entire capture and finds the most complete signal burst, placing two markers around it so you can see right away where the useful content starts and ends. You can then adjust those markers and zoom in to inspect individual pulses, or zoom out to see the shape of the whole recording at a glance. The app switches between two display modes depending on your zoom level: a bar-height view at wide zoom to show where activity is clustered, and a square wave view when zoomed in tightly enough to see individual pulse shapes.
Once your markers are where you want them, you can save just that selection as a new file, or you can use the cut function to remove a section from the middle of the recording while keeping the rest for further editing. There is also an undo option that reverts the last cut as long as you have not yet saved.
The app never transmits any signal. It only reads and rewrites files already stored on the Flipper's SD card. It supports RAW captures and KeeLoq protocol files, and always writes output in the RAW format. The project is written in C and is built as a Flipper Zero app.
Where it fits
- Clean up a noisy Flipper Zero RAW recording to isolate a single usable signal burst before replaying it.
- Trim silence and repeated copies from a captured radio signal directly on the Flipper Zero without a computer.
- Cut out a specific section from the middle of a recording while keeping the rest for further editing.
- Inspect individual pulse shapes by zooming in on a captured signal to verify its structure.