Drop a file here
About Audio Trimmer — Free Online Tool
Audio Trimmer keeps a single span of a recording and discards everything outside it — a straight top and tail, with no option to cut a hole in the middle.
Nothing on this page listens for silence. You give it a start time and either an end time or a length, and ffmpeg seeks to that point and writes that many seconds out; it is the same engine that drives the Audio Cutter, with the remove-a-section mode switched off, so a trim can only ever shorten a file from the outside in. The seek is applied to the input before the file is opened, which is why starting ninety minutes into a lecture recording costs no more time than starting at the beginning.
Trimming is done locally in WebAssembly, so an interview or a dictated note never travels. The input is held in a virtual filesystem inside the page and discarded whether the run succeeded or failed.
Dropping the first minute of room noise from a lecture recording, keeping the usable take out of a long rehearsal, shortening a voice note to the part worth sending, and cutting a recording down before someone types it up.
Also known as: trim silence audio · shorten voice note · cut silence from podcast · remove dead air · audio cutter
When to use it
Get a podcast episode or a voice audition starting at the first useful word, once you know where that word is.
How it works
You give it a start and end timestamp, or a start and a duration, and it cuts there. There is no automatic silence detection.
Finding The Right Timestamps
Nothing on the page measures loudness, so the two times come from you — play the file in any player, note where the speech starts and stops, and type those figures in. Both accept either seconds or m:ss.
How to Use Audio Trimmer in 4 Easy Steps
Follow this simple guide to process your files in seconds directly inside your browser tab.
Select or Drop Your MP3/WAV/M4A
Drag and drop your MP3/WAV/M4A directly into the Audio Trimmer workspace above or click 'Choose files'. You can process up to 1 file in a single run.
Configure Your Preferences
Adjust the available optimization sliders, target formats, or custom options. Get a podcast episode or a voice audition starting at the first useful word, once you know where that word is.
Instant In-Browser Execution
The client-side engine executes Audio Trimmer locally on your device hardware with zero server latency and 100% private in-memory sandboxing.
Preview & Download MP3
Inspect the processed file, compare file size savings or output quality, and click Download to save the finished MP3 file directly to your disk.
Why Use Audio Trimmer on ShortTrick
Engineered for maximum speed, strict privacy, and frictionless digital productivity.
100% Private & Local
Files processed with Audio Trimmer never leave your computer or phone. Zero cloud uploads, zero tracking, and zero risk.
Blazing Fast Engine
Powered by compiled WebAssembly code running directly in your browser with sub-second execution for Audio Trimmer.
No Paywall or Account Required
Audio Trimmer is completely free with no hidden charges, watermarks, email signups, or artificial daily limits.
High-Fidelity Quality
Advanced algorithms preserve crisp vector text, clear colors, and structural layout integrity.
Generous 50 MB Size Limit
Handle files up to 50 MB and process up to 1 files in convenient batches with Audio Trimmer.
Cross-Device Compatibility
Runs seamlessly in modern browsers on Windows, macOS, Linux, iOS (iPhone/iPad), and Android.
Supported Formats & Limits
Designed for high performance with browser-side memory guarantees.
50 MB
1
Frequently Asked Questions About Audio Trimmer
Common questions regarding Audio Trimmer, data privacy, file format compatibility, and usage limits.
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