Convert any file by dragging it.

Hold Shift while you drag in Finder. Drop the file into a box, and the converted copy lands beside the original.

Download for Mac

Free. Needs a Mac with Apple silicon and macOS 14 or later.

Opening Isomer for the first time

macOS will say Apple could not verify Isomer is free of malware. That’s because Isomer isn’t notarized by Apple yet, not because anything is wrong.

  1. Drag Isomer into your Applications folder.
  2. Double-click Isomer. When the warning appears, click Done.
  3. Open menu › System Settings › Privacy & Security.
  4. Scroll down to Security. You’ll see Isomer was blocked to protect your Mac. Click Open Anyway.
  5. Enter your Mac password or use Touch ID, then click Open Anyway again.
Drop a file into a box. The converted copy rises back out.

Convert a copy

Six formats picked for your file. Saved next to the original.

The Isomer bar offering JPG, PNG, PDF, WebP, AVIF and TIFF

Replace the original

The original moves to the Trash once the new file is ready.

The Isomer bar marked Replaces original

Tools for that file

Compress, crop, trim, redact and more, without opening an app.

The Isomer tools bar: compress, metadata, edit, annotate, add background, crop, redact

Nothing leaves your Mac.

No uploads, no account. Error reports, if you allow them, never include your files.

Uses almost nothing.

Waits in your menu bar without touching the processor.

Processor
0.0%
Memory
35 MB
Isomer app icon

Stop opening apps to change a file.

Isomer lives in your menu bar and waits for the next drag.

Download for Mac

Free. Needs a Mac with Apple silicon and macOS 14 or later.

Isomer is free. If it saves you time, you can buy me a coffee.

Buy Me a Coffee

Questions, ideas or a file Isomer can't handle? Get in touch.

Email me