Free Audio Processor
Just want a smaller file? Use Quick. Got a batch? Use Studio. Audio never leaves your device — everything runs locally.
More settings
| File | Duration | Original | Target | After | Result |
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What is this tool?
A completely in-browser free audio processing tool. Type a size cap (say 10MB) and it tunes the encoder to fit; or just convert, edit metadata, trim a clip, or batch-download a ZIP.
Unlike most online audio tools, the audio never leaves your device — everything runs locally. No upload means no waiting, no privacy risk, and it works offline.
Good for:
- Submissions that say “audio must be under 10MB”
- Podcast platforms with per-episode size caps
- Ripped CDs with missing cover art
- Just convert WAV to MP3 without touching quality
- Make a ringtone / cut a teaser from a podcast
- A pile of recordings with uneven loudness
How to use
The page has two lanes — pick whichever matches your job:
- Quick — One file, just make it smaller or convert it. Drag it in, type a number, hit Start. Format and bitrate are decided for you.
- Studio — Process a pile at once. Pick the task (compress / convert / both / metadata-only / trim-only), drop the files, hit Start. Everything uses the same settings; flip on “Per-file settings” when one file needs its own target.
- Download — Single files download directly; multiple files get zipped into one ZIP.
FAQ
Is my audio uploaded?
No. Everything runs in your browser — no server involved. It works offline too. That’s also why there’s no upload progress bar: there is no upload.
Can it compress audio to under 10MB?
Yes — that’s the point. Type a target (say 10) and the tool finds the highest bitrate that still fits. If the content is genuinely too dense, it says so honestly instead of pretending.
Which formats are supported?
Input: MP3, WAV, OGG, M4A, AAC, FLAC, WebM — anything your browser can decode. Output: WAV, MP3, OGG, or metadata-only (no re-encode).
Why did the file get bigger after compression?
Re-encoding has overhead. Already-tight files can grow slightly. In that case the tool keeps the original and says “already optimal”.
How many files at once?
No count or size limits — there’s no server bandwidth to run out of. Processing is sequential on purpose so we don’t blow up browser memory; large batches just take a bit longer.
Can I add cover art to ripped CD audio?
Yes. In Studio, pick “Edit metadata only”, drag your ripped files in, choose a square JPG/PNG cover, save. This rewrites tags only — no re-encode, zero quality loss.
Can I edit title, artist, and other tags?
Yes. The metadata editor handles title, artist, album, year, track number, genre, and cover art. You can apply one set to the whole batch, or fill each file individually.
Will quality drop noticeably?
Depends on your target. 60–80% of the original is usually transparent; below 30% you’ll start to hear it. Try one or two first, then run the batch.
Just want to cut a clip or ringtone without losing quality?
Use Studio’s “Trim / Normalize only”, set the in/out points, and leave bitrate and format alone. Output keeps the original format and bitrate — it just cuts the timeline.
Does it work on mobile?
Yes — the page is responsive. Mobile memory is limited though, so process long files or big batches in smaller chunks.
Do I need to sign up or pay?
No. No account, no ads, no count or size limits.
How is this different from other online audio tools?
Three things. First, audio never leaves your device — everything runs locally. Second, size-targeted compression — most tools only give you a bitrate slider and you have to guess; this one takes “10MB” and guarantees the output fits. Third, metadata editing, trimming, normalization, and batch ZIP all live in one place.