How to Compress a TIFF File on Mac — Free, No Software Install

The fastest way to compress a TIFF file on Mac is to convert it to WebP in your browser — no Photoshop subscription, no third-party software install. Open Safari or Chrome, drop your TIFF file into the converter, and download a WebP file that is 85-99% smaller. The whole process takes under 30 seconds and your files never leave your Mac.

Mac Options for Compressing TIFF

On a Mac, you have several options for compressing a TIFF file. Here is an honest comparison:

Method	Compression	Time Required	Cost
Browser-based converter (this tool)	85-99% smaller	Under 30 seconds	Free
macOS Preview (export as PDF or JPG)	60-90% smaller	1-2 minutes	Free (macOS)
Photoshop LZW compression	30-50% smaller	1-3 minutes, requires Photoshop	Subscription required
ImageMagick CLI	Variable	Minutes to set up	Free, requires Terminal

The browser-based approach wins on every metric for web-use images: fastest, best compression, no cost, no install.

How to Compress TIFF on Mac Using Your Browser

1. Open Safari or Chrome on your Mac — no extension needed.
2. Go to the TIFF to WebP converter — the tool runs entirely in your browser.
3. Drag your .tiff file from Finder directly into the drop zone.
4. Set quality — the default 85 is right for most uses. If you need an even smaller file, try 75-80.
5. Click Convert to WebP — your Mac processes the file locally, no upload occurs.
6. Click Download — the WebP file saves directly to your Downloads folder.

For multiple TIFF files, you can drag them all in at once and download a ZIP of all converted results.

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Using macOS Preview to Compress TIFF (Built-In Option)

macOS Preview can export TIFF files to JPG or PNG, which compresses them significantly. To do this:

1. Open the TIFF file in Preview (double-click it)
2. Go to File > Export
3. Choose JPEG format and set Quality to 80-85%
4. Click Save

This works and is free, but the JPG output is typically 3-5x larger than WebP at equivalent quality. Preview cannot export directly to WebP. If you want the smallest possible output for web use, the browser-based TIFF to WebP converter outperforms Preview significantly.

Preview also supports "Export as PDF" which works for documents but is not appropriate for photographs going to a website.

LZW Compression on Mac — What It Actually Does

If someone tells you to "compress TIFF using LZW on Mac," they mean applying LZW compression internally within the TIFF file using Photoshop, GIMP, or another image editor. This:

• Keeps the file as a TIFF (same format, still not browser-compatible)
• Reduces size by 30-50% for photographs
• Is completely lossless — no quality change

LZW is the right choice when you must stay in TIFF format (for print workflows or archiving) and want to save disk space. It is NOT the right choice when your goal is a web-ready, small file — for that, convert to WebP and achieve 85-99% reduction instead of 30-50%.

Frequently Asked Questions

Can I compress a TIFF on Mac without Photoshop?

Yes. Use your browser — Safari or Chrome — to convert the TIFF to WebP. No software install needed, no Photoshop subscription. The conversion takes under 30 seconds.

Does macOS Preview compress TIFF files?

Preview can export TIFF to JPG or PNG, which reduces file size. But it cannot export to WebP, and JPG at equivalent quality is 3-5x larger than WebP. For maximum compression on Mac, use a browser-based TIFF to WebP converter.

Will the TIFF file on my Mac be changed?

No. The converter reads your TIFF file and creates a new WebP file. Your original TIFF remains untouched on your Mac.

Does this work on Apple Silicon (M1/M2/M3) Macs?

Yes. The converter runs in your browser and works identically on Intel and Apple Silicon Macs.