Is my audio file uploaded to a server?

No. The entire trim happens inside your browser. Your audio is read into memory on your own device, the selected segment is cut locally by a WebAssembly build of FFmpeg, and the trimmed MP3 is handed straight back to you as a download — no byte of the audio is ever sent to us or anyone else. This is especially valuable when the original is a private voice note or recording; here only the short clip is produced, and the full file never leaves your machine. Close the tab and nothing is retained.

What audio formats can I trim, and what do I get back?

You can trim MP3, WAV, M4A, AAC, OGG, and FLAC files — the formats people most commonly have. Whatever you put in, the tool returns a 192 kbps MP3. MP3 is the most universally compatible audio format, so the trimmed clip will play on virtually any phone, music app, or device without needing extra software. You do not need to choose an output format; every trim gives you the same predictable, widely playable MP3.

Yes. The tool re-encodes the selected segment rather than copying it, so the clip begins and ends precisely at the times you entered, down to a fraction of a second if you use decimals. This matters for things like ringtones or sharing a specific line, where landing on the exact moment is the whole point. You enter the start and end, and the trimmed audio matches them exactly.

Why does the first trim download about 30 MB?

The trimming is done by a full build of FFmpeg compiled to WebAssembly so it can run inside your browser. That engine is about 30 MB, and it downloads once the first time you use the tool. After that your browser caches it, so later trims start right away without downloading it again. This one-time cost is what lets the audio be trimmed on your own device instead of on a server you would have to upload it to.

Is there a limit on file size?

Yes — 500 MB. Because the work is done entirely by your own device inside a browser tab, the file has to fit in the tab’s memory while it is processed, and very large files would risk crashing the tab. Audio files are rarely anywhere near this large, so in practice the limit almost never gets in the way — even a long, high-quality recording usually sits comfortably under it.

Convert

Audio Trimmer

Cut an audio file to an exact start and end time and download the clip as an MP3 — right in your browser. Works with MP3, WAV, M4A, AAC, OGG, and FLAC. Nothing is uploaded. Free, no signup.

By the Samastam teamLast updated 2026-06-14

Drop an audio file here, or click to browse

Everything runs in your browser — nothing is uploaded

An audio trimmer cuts an audio file down to just the part you want, between a start time and an end time. This tool lets you type an exact start and end — in seconds, minutes and seconds, or hours, minutes and seconds — and returns precisely that segment as an MP3, entirely inside your browser. The cut lands exactly where you ask because the selected segment is re-encoded rather than copied. It accepts the formats people actually have — MP3, WAV, M4A, AAC, OGG, and FLAC — and always gives back a widely playable MP3. Because the work happens locally, your recordings never leave your device; a long podcast, a voice note, or a song all stay on your own machine, and only the trimmed clip is produced.

What this is and why it matters

Audio, like video, usually arrives longer than the part you actually need. A favourite film song contains the thirty seconds that would make a perfect ringtone. A two-hour recorded podcast contains the one answer worth sharing with a friend. A rambling voice note contains a single important sentence. A long devotional recording contains the one shloka someone wants on repeat. An interview a journalist recorded contains the quote that matters. In every case the task is the same: keep one continuous stretch of sound and discard the rest. Trimming is how a long recording becomes the short, shareable clip you can actually use.

This tool trims in the browser rather than on a server, for the same privacy reason as the rest of the toolkit. Audio recordings are often personal — a private voice note, a confidential interview, a family recording — and uploading the whole file to a website just to keep a few seconds of it is both slow and a privacy risk. Here, the audio is read into memory on your own device, the chosen segment is cut locally, and only the trimmed clip is produced. Nothing is transmitted and nothing is stored.

The tool accepts the audio formats people really have on their devices — MP3, WAV, M4A, AAC, OGG, and FLAC — and always returns an MP3. MP3 at 192 kbps is the most universally compatible choice: it plays on every phone, music app, and car stereo, and it is small enough to share easily. So whatever you start with, you get back a clip that simply works everywhere, cut to exactly the moment you chose.

How to use this tool

Add your audio file. Drag it onto the drop zone above, or click to open the file picker and choose a file from your device. MP3, WAV, M4A, AAC, OGG, and FLAC are all accepted. The moment it is selected, the tool reads it locally and shows the file name, its size, and its total duration, so you know the range you can trim within. Nothing uploads — everything happens on your own machine. Files must be under 500 MB.

Enter the start and end times. Type when the clip should begin and end. You can use plain seconds (for example 15), minutes and seconds (00:15), or hours, minutes and seconds (00:00:15), and you can include decimals for sub-second precision. Leave the start blank to begin from the very beginning, or leave the end blank to run through to the end of the file. The tool checks that the end is after the start and within the duration, and tells you clearly if something is off.

Let the engine load on first use. The first time you trim, the tool downloads a one-time engine of about 30 MB into your browser. This happens only once — afterwards it is cached and later trims start immediately.

Trim and download. Press Trim Audio and the tool cuts the selected segment and re-encodes it as an MP3, showing a live percentage as it works. You can cancel at any time. When it finishes, it shows the length and size of the trimmed clip and offers it for download as an MP3 named after your original file.

Examples and use cases

Making a 30-second ringtone from a film song

A Mumbai student wants the hook of a favourite Bollywood song as a ringtone. They load the MP3, enter the start and end of the thirty-second section they like — say 00:48 to 01:18 — and the tool returns exactly that clip as an MP3 they can set as their ringtone. The song file never left their phone, and the cut lands precisely on the beat they chose.

Clipping one answer from a recorded podcast

A Pune listener recorded a long podcast episode and wants to share just the two-minute answer a guest gave about starting a business. They enter the start and end times of that answer and get a short MP3 to send on WhatsApp, without uploading the full hour-long recording anywhere. Because the cut is sample-accurate, the clip starts exactly on the guest’s first word and ends cleanly, with no stray seconds of the host talking over the answer.

Trimming a voice note down to what matters

A Delhi shop owner received a three-minute voice note but only the last forty seconds — the delivery address — needs forwarding to the courier. They trim the audio to just that part and forward a clean, short clip, keeping the rest of the personal message private.

Cutting one shloka from a long devotional recording

A listener in Varanasi has a forty-minute devotional recording and wants one particular shloka on repeat. They enter the start and end of that passage, and the tool produces a short MP3 of just that section — processed entirely on their own device, with the full recording staying private.

Frequently asked questions

Is my audio file uploaded to a server?: No. The entire trim happens inside your browser. Your audio is read into memory on your own device, the selected segment is cut locally by a WebAssembly build of FFmpeg, and the trimmed MP3 is handed straight back to you as a download — no byte of the audio is ever sent to us or anyone else. This is especially valuable when the original is a private voice note or recording; here only the short clip is produced, and the full file never leaves your machine. Close the tab and nothing is retained.
What audio formats can I trim, and what do I get back?: You can trim MP3, WAV, M4A, AAC, OGG, and FLAC files — the formats people most commonly have. Whatever you put in, the tool returns a 192 kbps MP3. MP3 is the most universally compatible audio format, so the trimmed clip will play on virtually any phone, music app, or device without needing extra software. You do not need to choose an output format; every trim gives you the same predictable, widely playable MP3.
Is the cut exact?: Yes. The tool re-encodes the selected segment rather than copying it, so the clip begins and ends precisely at the times you entered, down to a fraction of a second if you use decimals. This matters for things like ringtones or sharing a specific line, where landing on the exact moment is the whole point. You enter the start and end, and the trimmed audio matches them exactly.
Why does the first trim download about 30 MB?: The trimming is done by a full build of FFmpeg compiled to WebAssembly so it can run inside your browser. That engine is about 30 MB, and it downloads once the first time you use the tool. After that your browser caches it, so later trims start right away without downloading it again. This one-time cost is what lets the audio be trimmed on your own device instead of on a server you would have to upload it to.
Is there a limit on file size?: Yes — 500 MB. Because the work is done entirely by your own device inside a browser tab, the file has to fit in the tab’s memory while it is processed, and very large files would risk crashing the tab. Audio files are rarely anywhere near this large, so in practice the limit almost never gets in the way — even a long, high-quality recording usually sits comfortably under it.