Rename the extension. Morph does the rest.
A tiny menu-bar app for macOS. Rename a file from .mov to .mp4 in Finder and it actually becomes an MP4 — locally, instantly, safely.
$5.99 one-time · Images free forever · macOS 13+ · Originals always kept
How it works
Three steps. No new habits.
Morph waits quietly in the menu bar and acts the moment you rename a file — no app to open, nothing to learn.
clip.mov → clip.mp4Rename the extension
In Finder, rename clip.mov to clip.mp4 — exactly the way you always would.
Morph spots the mismatch
It notices the new extension no longer matches what's actually inside the file.
It converts, safely
The file becomes a real MP4. Your original is kept, and undo is one click away.
Features
Small app. Serious range.
Everything Morph does, it does locally on your Mac — quickly, privately, and without ever touching your originals.
Just rename
No app to open, no dialogs, no export menus. Convert files right where you already work — in Finder.
Local & private
Conversions run on your Mac with ImageIO and ffmpeg. Nothing is ever uploaded — it works on a plane.
Safe by default
Every original is preserved automatically. Undo any conversion in a single click.
Images, free
JPG, PNG, HEIC, WebP, TIFF, GIF and more — converted for free, forever.
Audio & video
mp3 · wav · flac · aac · m4a · ogg · aiff and mp4 · mov · m4v · mkv · webm · avi.
Lives in the menu bar
Pick watched folders, see conversion status, and activate your license — fully offline.
Right-click “Convert to…”
Convert straight from the Finder context menu — no rename needed.
Pricing
Buy it once. Own it forever.
No subscriptions on individual tools — that's the whole point.
Morph
Buy it once. Own it forever.
- Everything in the free image tier
- Audio & video conversion
- Unlimited watched folders
- Free updates — no subscription
Whittle All-Access
Every Whittle tool, including everything we ship next.
- Morph, fully unlocked
- Every current & future Whittle app
- All updates included
- The only Whittle subscription
Images are free, forever — no account, no trial timer. Per-tool purchases are one-time; All-Access is the only subscription.
FAQ
Questions, answered
Is Morph safe to use?
Yes. Morph always keeps your original file and any conversion can be undone in one click, so you can never lose data by renaming.
Does it upload my files?
Never. All conversion happens locally on your Mac using ImageIO and ffmpeg. Nothing is uploaded, there are no accounts, and it works completely offline.
Which formats can it convert?
Images are free: JPG, PNG, HEIC, WebP, TIFF, GIF, BMP and more. Audio (mp3, wav, flac, aac, m4a, ogg, aiff) and video (mp4, mov, m4v, mkv, webm, avi) are unlocked with Morph Pro or All-Access.
Is it one-time or a subscription?
Morph is a one-time $5.99 purchase — buy it once and own it forever. The only subscription is Whittle All-Access ($15.99/year) for every tool we ship.
What macOS version do I need?
macOS 13 (Ventura) or later, on both Apple Silicon and Intel Macs.
How do I get help or a refund?
Email [email protected] and a human will get back to you. We're a small studio and we read every message.
Be first when Morph launches
Drop your email and we'll send the download the moment Morph is notarized — or get it now and be ready on day one.