AudioMass
audiomass.co
A waveform audio editor that runs in the tab with nothing uploaded
No sign-upOn device
Loading page
recordscreen.io
Records your screen and webcam from a tab, saving straight to disk.
Click record, choose a window or the whole screen, optionally overlay your webcam in a circle, and stop — the file downloads as WebM. It uses RecordRTC to capture and mux inside the page, so there is no upload step, no account and no cloud copy sitting somewhere. There is also no editing: what you record is what you keep.
AltFTool does this too
If you would rather not leave the site, Screen Recorder covers the same job here — free, no account, and it runs in your browser.
Open Screen RecorderQuestions
Works the moment the page loads. No account, no email, no trial. No trimming or editing at all, and the recording is lost if the tab closes before you save it.
No. RecordScreen.io does the work inside your browser, so the file never leaves your device — you can load the page, disconnect from the network, and it still works. That makes it a reasonable choice for material containing personal data.
No trimming or editing at all, and the recording is lost if the tab closes before you save it.
Alternatives
Same category or same task, ordered by how closely they overlap.
audiomass.co
A waveform audio editor that runs in the tab with nothing uploaded
online-video-cutter.com
Trims, crops and rotates a video with no account and no watermark
otranscribe.com
Play the audio and type the transcript in the same window
vocalremover.org
Splits a song into a vocal track and a backing track
vocaroo.com
Press record, get a link to the audio, send it to someone
huggingface.co
Runs OpenAI's Whisper speech recognition inside your own browser