Full disclosure: I work on OnePassApps.
Trimming a recording usually means uploading it to a website you do not know, waiting in a queue, and downloading a copy from a server that now has your audio too.
The Audio Studio at OnePassApps does it in the tab you already have open. There is no upload step, because there is nowhere for the file to go.
The four Audio Studio tools
The studio opens on four tool tabs: Convert, Compress, Trim and Extract. Its own one-line description reads: "Trim and convert local audio with formats checked against your browser."
That last clause matters more than it looks. The formats on offer are checked against the browser you are actually using, so the list is what your browser can work with, not a marketing table of every format that exists somewhere.
What the Trim panel gives you
Trim is the one that deals with time rather than format. Its three steps read:
- 01 Source - "No file yet. Drop one on the stage or browse for it. Up to 32 MiB and 45 minutes."
- 02 Options - "Drag the handles on the stage or type exact start and end times once the file has been checked."
- 03 Result - "A new file with only the range you keep. Your original stays unchanged."
Once a file is loaded, the Options panel becomes the controls themselves: Start time and End time fields, and the line "Drag the handles on the stage, or press I and O at the playhead." The player strip below says the same thing: "Space plays or pauses. I and O set the selection at the playhead." There is also Output format ("WAV audio (PCM)"), Sample rate and Channels, with the note "Defaults keep the source's mono and sample rate when the chosen encoder supports them."
So trimming is not a separate upload-and-wait job. You open the file, set the two points you want, and the work happens on the copy already in the tab.
What it accepts
The file picker states the limits in one line:
MP3, WAV, M4A, AAC, OGG, Opus, FLAC or WebM · up to 32 MiB and 45 minutes
Eight input formats, and the ceiling is visible before you pick a file rather than something you find out at the end.
What the export actually produced
I ran it in the tab with a real WAV file. The source stage read "tone.wav - WAVE · 0:02.0 · 172 KiB", the inspection line said "WAVE inspected locally. PCM-S16 audio, 0:02.0.", and after "Export selected range" the Result panel showed:
- "Ready", with Before 172 KiB 0:02.0 and After 172 KiB 0:02.0
- "Created in 0.6 s"
- an output file "tone-trimmed.wav - 0:02.0 · 172 KiB" with a Download WAV button, and an "Export again" button beside it
The last line under the output is the one worth quoting: "Output created locally. Your original file remains unchanged."
Why it stays local
Under the picker the page says: "Processing stays in this browser."
That is a different architecture from the online editors, not just a different promise. There is no upload, no server-side job, no queue, and no copy of your recording sitting on somebody's disk. The decode, the cut and the re-encode happen in the page you already have open.
One practical consequence, and it is the same for every browser-local tool: download your trimmed copy before you close the tab. The result lives in the page, not on a server you can come back to.
What it costs right now
The plan block on the Audio Studio page reads: "FREE PROMOTIONAL PERIOD", "Standard is free right now", "$0 / month", and "100,000 credits every 30 days · No end date set · No card required", followed by "No automatic paid subscription. Existing paid subscriptions keep their terms."
Trimming is browser-local work, so it is not a credit question at all. No card is involved either way.
Try it
Open the Audio Studio, drop in a recording, set the range, and download the result:
If the recording is something you would rather not hand to a stranger, this is the version of the job that never asks you to.
Disclosure: I work on OnePassApps.
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