Trimr
100% On-Device · Free for Personal Use
Every Audio Tool.
One Window.
Trim, cut silence, normalize loudness, fade, change speed, join, split, make ringtones, convert. Drag in any audio file — or a video, to pull out its sound — and Trimr handles it all, entirely on your Mac. Nothing is ever uploaded.
v1.2.1 · macOS 12+ · Apple Silicon & Intel · Signed & notarized by Apple · No account
How it works
Three steps, then you're done.
Drag in your audio
Drop any audio file onto the window — or a video, and Trimr pulls the sound out for you. The waveform appears instantly, ready to edit.
Shape it on the waveform
Drag to select — or press I and O — then trim, cut, remove silence, normalize, fade, or change speed. Space plays exactly what you'll export: playback skips your cuts, so you hear the final edit first.
Export
Pick M4A, MP3, WAV, FLAC, AIFF, OGG or OPUS — or an iPhone ringtone. Trimr writes a new file and never touches your original.
Features
Everything Mac audio editing should be.
One focused, native window with every tool you reach for — without ever sending your audio to the cloud.
A real waveform editor
See your audio, drag to select, zoom to the millisecond, and play exactly what you'll export. Drop in a video and Trimr pulls its soundtrack out automatically.
Trim & cut anything
Keep only the selection, or cut out as many sections as you like. Cuts preview live — playback skips them so you hear the final edit before exporting — and every cut is one click to restore.
Non-destructive
Silence, gone
Find every quiet gap — you choose how quiet and for how long — see them highlighted on the waveform, and remove them all in one click. Or split the file into separate tracks at each silence.
Lossless trims
Trimming an MP3, M4A, OGG or Opus file and saving it back to the same format copies the audio across untouched — no decoding, no re-compressing, no quality lost for a job that only removed the ends. Trimr tells you when an export qualifies, and which setting is stopping it when it does not.
New
Split points
For a recording that never goes quiet — a DJ set, a side of a record, a lecture with no pauses — put the playhead where one track ends and mark it. Split the file into that many separate tracks in one go.
New
Set once, apply to all
A queue is usually one session's recordings wanting the same treatment. Dial in the volume, speed and fades on one file and give them to every other file at once. Trims stay put — those belong to their own waveform.
New
Loudness done right
Measure real loudness (LUFS + true peak), then normalize to −14 LUFS for streaming, −16 for podcasts, −23 for broadcast, or a −1 dB peak — a true two-pass EBU R128 pass, measured on the edited audio.
EBU R128
Fades you can see
Smooth or linear fade in and out, drawn right on the waveform — so you see exactly what you'll hear.
Speed, pitch intact
Slow down to 0.5× or speed up to 3× with pitch preserved — the preview plays at the new speed, so a 2× podcast still sounds like the host, not a chipmunk.
Join with crossfade
Combine files in any order into one seamless track, with an optional crossfade between them.
iPhone ringtones
Select up to 40 seconds and get an iPhone-ready .m4r with a gentle automatic fade-out. Any song, any recording — your ringtone.
.M4R
Convert anything
M4A, MP3, WAV, FLAC, AIFF, OGG and OPUS out — with bitrate, sample-rate and mono/stereo control. Almost any audio or video format in.
100% on your Mac
Nothing is uploaded — ever. No account, no cloud, no telemetry. Your originals are never modified: every export is a new file.
Privacy
Signed & notarized
Opens with a normal double-click — no "unidentified developer" warning, no Open Anyway, no Terminal. Notarized by Apple.
No warnings
Stays up to date
Trimr quietly checks for new versions about once a week and badges the update button when one's ready — never a pop-up, and nothing downloads or installs automatically. Turn it off anytime.
New in 1.1.0
Matches your Mac
The Dock icon follows your system's Light or Dark appearance automatically — or pin it to Light or Dark yourself from the appearance toggle.
New in 1.1.2
Built for everyone
The whole editor is keyboard-driven — Space, arrows, I/O, Z/F — with VoiceOver labels throughout, and the UI meets WCAG 2.1 AA contrast in light and dark.
WCAG 2.1 AA
Speaks your language
Trimr's interface comes in 13 languages and auto-detects your Mac's language on first launch — switch anytime from the in-app flag picker.
New in 1.1.8
Edit tags & album art
Title, artist, album, year, genre, comment, and album art — view and edit a file's built-in tags right in the app. Saved straight to the file, no export needed.
New in 1.1.9
Audition the selection
Play just the selected part — press ⇧Space or the play-selection button and playback starts at your in point and stops dead at your out point, so you can check a trim by ear.
New in 1.2.1
Reads & writes
M4A
MP3
WAV
FLAC
AIFF
OGG
OPUS
M4R ringtone
+ the audio from almost any video
Pricing
Free for you. Fair for work.
Personal use is free forever — every tool, no key, no account, no watermarks. If Trimr earns its keep at your job, a one-time business license keeps it supported.
Personal
Free forever
For individuals and personal projects
- Every tool — trim, silence, loudness, fades, speed, join, ringtone, convert
- Non-destructive — originals never modified
- Fully keyboard-driven & VoiceOver accessible
- 100% on-device processing
- No account, no nag screens
- Free updates forever
Business
$5 / computer
One-time payment — no subscription
- Everything in Personal
- Use commercially at work
- One-time payment — no subscription
- Free updates forever
- Supports solo indie development
The personal tier is the full app — buy a business license only if you use Trimr commercially. One seat per computer, paid once, yours for life. Secure checkout via Stripe; your license key is emailed instantly.
Download & install
Get set up in seconds.
Download the app and drag it into Applications — that's it. No Terminal, no Homebrew, no sign-up.
Version 1.2.1 · Released August 9, 2026 · Free updates forever
macOS 12 Monterey or later · Apple Silicon or Intel
Everything Trimr needs — including the FFmpeg engine that powers the editing — is built right into the app. Nothing else to install.
Opens with a double-click
Trimr is signed with an Apple Developer ID and notarized by Apple, so it opens cleanly the first time — no
Open Anyway trip through System Settings, no Terminal. Open the DMG, drag Trimr into Applications, and launch it.FAQ
Common questions.
Is Trimr really free?
Personal use is free forever — every tool, no account, no trial timer, no watermarks. If you use Trimr at work, a one-time $5 business license per computer keeps it supported.
How does the business license work?
If you use Trimr commercially, buy a one-time $5 license per computer from the pricing section — secure checkout via Stripe, and your license key is emailed instantly. The personal tier is the full app with no nag screens, so you can evaluate it freely first.
Does Trimr upload my audio anywhere?
No. Every edit and export runs entirely on your Mac — nothing you open or export is ever uploaded, and there's no account and no telemetry. The only time Trimr contacts our server is if you enter a business license key (to validate it) or click Check for Updates (which sends only the app version). Your audio is never involved.
Will it change my original files?
Never. Trimr is non-destructive by design: your trims, cuts, fades and other edits are applied when you export, and every export writes a new file. Same-name files are never overwritten unless you say so.
What formats can it read and write?
Out: M4A, MP3, WAV, FLAC, AIFF, OGG and OPUS — plus iPhone ringtones (.m4r) — with bitrate, sample-rate and mono/stereo control. In: almost any audio format, or drop in a video and Trimr extracts its soundtrack.
How do I make an iPhone ringtone?
Open the file, select the part you want — up to the 40-second ringtone limit — and choose Ringtone. Trimr exports an iPhone-ready
.m4r with a gentle automatic fade-out, ready to sync to your iPhone.What do the loudness presets mean?
They're EBU R128 loudness targets: −14 LUFS is the standard for streaming platforms, −16 LUFS for podcasts, and −23 LUFS for broadcast. Trimr measures your edited audio and applies a true two-pass normalize so exports land on target — or you can normalize to a −1 dB peak instead.
Will macOS warn me about an unidentified developer?
No. Trimr is signed with an Apple Developer ID and notarized by Apple, so it opens with a normal double-click the first time — no Open Anyway dance, no Terminal.
How do I update Trimr?
Trimr updates itself. It checks about once a week and, when a new version is out, shows you what changed and offers to install it in place — the download is signature-checked, and one that doesn't verify is refused. You can also check on demand, turn the automatic check off in the update panel, or download the DMG from this page and drag it into Applications yourself. Your preferences carry over.
Is there a Windows version?
Not yet — Trimr is Mac-only for now. It's built as a native Mac app from the ground up, window to waveform.