Trim Audio Online - Free
Pick the part of your audio you need, drop everything else. Trimming keeps your selection and discards the rest. The edit happens at the sample level inside your browser - nothing is re-encoded until you export, and nothing leaves your device.
Pick the part of your audio you need, drop everything else. Trimming keeps your selection and discards the rest. The edit happens at the sample level inside your browser - nothing is re-encoded until you export, and nothing leaves your device.
Problems This Tool Solves
My trimmed MP3 file is bigger than the original
This happens when you export at a higher bitrate or as WAV. Match the original bitrate in export settings to keep the file small.
There is a click at the start or end of my trimmed clip
Your trim point lands at a non-zero part of the waveform. Apply a short fade (0.5–1 second) to smooth it.
I need to make a ringtone but do not know what format to use
Use MP3 for Android, M4A for iPhone. Keep the clip under 40 seconds for best compatibility.
Common Use Cases
Make a ringtone
Grab 30–40 seconds from a song. Export as M4A for iPhone or MP3 for Android.
Pull a podcast clip
Isolate a quote or highlight to share on social media. Add a short fade to smooth the edges.
Clean up a voice memo
Cut the dead air at the start and end of a recording before sending it.
Shorten a lecture excerpt
Grab a specific section from a long recording for notes or a presentation.
How to Trim Audio Online
- Drop your audio file into the editor or tap Upload. MP3, WAV, FLAC, OGG, M4A, and WebM all work.
- Drag the selection handles on the waveform to mark the section you want to keep. Use the time fields for exact start and end points.
- Click Trim to Selection. Everything outside your markers is removed instantly.
- Preview the result, then click Export. Choose WAV for full quality or MP3 for a smaller file.
Trim vs Cut vs Split - Which Do You Need?
Trim
Keeps your selection and removes everything else. One input file, one output file.
Best for: isolating a clip, making a ringtone, extracting a quoteCut
Removes your selection and joins the remaining parts together.
Best for: deleting mistakes, removing ads, cutting dead air from the middleSplit
Divides one file into multiple separate files at the points you mark.
Best for: breaking a long recording into chapters or tracksTypical Workflow After Trimming
- Trim - Isolate the section you want to keep
- Fade In / Out - Smooth the edges to prevent clicks
- Normalize - Bring the clip to a professional volume level
- Convert - Export in the right format for your use case
Quick Tips
- Export at the same bitrate as your original MP3 to avoid unnecessary quality loss.
- Apply a short fade (0.5–1 second) to prevent clicks at the start and end of your trim.
- Zoom in on the waveform to place your selection handles precisely between words or beats.
- Use WAV export when you plan to edit the file again later. Convert to MP3 only as a final step.
- Avoid repeatedly opening, editing, and re-saving MP3 files. Each open-edit-save cycle re-encodes the audio, and quality degrades with every pass.
Common Misconceptions
Myth: Trimming degrades audio quality
Reality: The trim itself does not alter the audio data. Quality only changes when you export. Export as WAV for zero loss.
Myth: You can trim an MP3 without re-encoding
Reality: In a browser, the MP3 is decoded to raw audio for editing. Re-encoding happens on export. Match the original bitrate to minimize any difference.
Common Problems and Fixes
The exported file is larger than the original
This happens when you export a trimmed MP3 as WAV, or when the export bitrate is higher than the source. Match the original bitrate, or export as WAV only if you need lossless quality.
There is a click or pop at the start or end
Your trim point lands at a non-zero part of the waveform. Select a small region around the edge and apply Fade In or Fade Out to smooth it.
Selection handles are hard to drag on mobile
Use the time input fields below the waveform to type exact start and end times. Pinch to zoom in for finer control.
Why Use This Trim Audio Online
- Edits at the sample level with no re-encoding until you choose to export
- Works with MP3, WAV, OGG, FLAC, AAC, M4A, and WebM files
- Drag handles or type exact times for precise selection
- Undo and redo up to 6 steps if you trim too much
- Entire process runs in your browser. Your file stays on your device.
Frequently Asked Questions
Does trimming reduce audio quality?
The trim itself does not change the audio data inside your selection. Quality depends on your export format. WAV 32-bit preserves the original quality exactly. MP3 re-encodes at your chosen bitrate.
Can I trim without re-encoding my MP3?
The browser decodes the MP3 to raw audio for editing. When you export as MP3, it re-encodes. To minimize quality loss, export at the same bitrate as the original (usually 128 or 320 kbps).
How do I make a ringtone from a song?
Upload the song, select a 30–40 second section, trim, then export. Use MP3 for Android or M4A for iPhone. Keep the clip under 40 seconds for best compatibility.
What is the difference between Trim and Cut?
Trim keeps your selection and removes everything else. Cut removes your selection and keeps everything else. If you want to delete a section from the middle, use Cut.
Is there a file size limit?
No hard limit. Processing runs in your browser using available memory. Files up to several hundred MB work fine on most devices.
What is the difference between trim, cut, crop, and split?
Trim keeps your selection, discards the rest. Cut removes your selection, keeps the rest. Split divides one file into multiple files at markers. Crop is a synonym for trim in most tools. If you want to delete a middle section, use Cut. If you want multiple output files, use Split.
How do I make an iPhone ringtone from a song?
Trim the song to 30–40 seconds, then export as M4A. Rename the file extension from .m4a to .m4r. Transfer it to your iPhone via iTunes, Finder, or GarageBand. Android uses MP3 - no renaming needed.