Best Image Optimizers for Mac in 2026: 8 Tools Compared

TL;DR: There's no single best Mac image optimizer, only a best one for each job. ImageOptim is still the best free compressor, though it hasn't shipped a release since 2023. Zipic has the strongest automation. Compresto is the pick if you also compress video and PDFs. ImageCrush (our app) is the one to choose when every batch needs cropping, resizing, converting, and watermarking in one pass. Squoosh is the best free way to compare codecs on a single image.

What is the best image optimizer for Mac? It depends on the job. For free, no-setup compression of JPEG, PNG, GIF, and SVG files, ImageOptim is still the standard. For hands-off automation, Zipic ($29.99) leads with folder watching, clipboard compression, Shortcuts, and a CLI. For a full export pipeline (crop to an aspect ratio, resize, convert to WebP/HEIC/AVIF, compress, rename, and watermark in a single batch with saved presets), ImageCrush ($14.99 one-time) covers the most steps per batch. All eight tools are compared below, with facts checked on October 8, 2026.

How we checked

We make ImageCrush, so take our pick with that in mind. To keep the rest of the comparison honest:

• Every price, format list, and feature claim was re-checked against each product's official site, pricing page, and changelog on October 8, 2026. Where a price couldn't be confirmed from an official page, we say so instead of guessing.
• We note where competitors beat ImageCrush, and several do.
• We added a column most roundups skip: when each app last shipped a release. For a tool you'll depend on for years, that matters.

The format and compression numbers we cite come from our own benchmark of 120 exports across 5 formats.

At a glance: price, platform, and maintenance

Three of the eight (ImageOptim, Optimage, and Squoosh) haven't shipped meaningful updates in a year or more. They still work, but don't expect new formats or fixes.

The 8 best image optimizers for Mac

1. ImageCrush: best all-in-one export pipeline

Best for: Anyone who repeatedly turns folders of images into finished deliverables at a specific size, shape, format, and filename, such as web developers, designers, photographers, and content teams.

ImageCrush is our native Mac app. Drop in files or folders and one export can crop to any of 17 aspect ratios (or a custom crop per image), resize to a max width and height, convert between JPG, PNG, WebP, HEIC, and AVIF, compress with a 1–100% quality slider, rename with custom names, suffixes, and sequence numbers, and add a text or logo watermark. Up to 8 images process in parallel.

Settings save as presets, and Preset Sequences chain presets so one drag exports several outputs: a 1200 px WebP and a 600 px JPEG thumbnail, or AVIF plus a WebP fallback. A before/after slider shows exactly what compression costs before you export, and originals are never overwritten. Processing is local, inside Apple's App Sandbox.

Where others beat it: No automation. There's no folder watching, Shortcuts, Raycast, or CLI (Zipic has all of these). No SVG or GIF optimization (ImageOptim). No video or PDF (Compresto). Requires macOS 15.7 or later.

Pricing: $14.99 one-time, covers two Macs. 7-day free trial with every feature. Download the trial.

Bottom line: Among the apps we checked, it's the only one with a batch crop editor, and it combines crop, resize, conversion, compression, renaming, watermarks, and multi-output presets in a single pass at the lowest one-time price here.

2. ImageOptim: best free compressor

Best for: Making existing JPEG, PNG, GIF, and SVG files smaller with zero configuration.

ImageOptim is the app that defined the category. Drag files in and they get smaller. It runs them through a stack of open-source engines (MozJPEG, pngquant, Pngcrush, Zopfli, SVGO, and others) with an optional lossy mode, and strips metadata by default. It's free, open source, and has a simple command-line entry point.

Limitations: No resize, no crop, no format conversion (no WebP, HEIC, or AVIF output), no presets. It replaces your files with the optimized versions and moves the originals to the Trash, which is handy until you empty the Trash. The last release (1.9.3) shipped in October 2023, and it now requires macOS 11 or later.

Pricing: Free.

Bottom line: Still the best free answer to "make these files smaller and change nothing else." Outgrow it the moment you need a different size or format.

3. Zipic: best for automation

Best for: People who want images compressed without thinking about it.

Zipic has the deepest macOS integration of any tool here: folder watching, clipboard auto-compression, and Notch Drop (all Pro), plus Shortcuts, Raycast, Finder integration, a URL scheme, and a CLI installable via Homebrew. It compresses with six levels, converts formats, resizes, and saves custom presets. The free tier covers JPEG, PNG, WebP, HEIC, and GIF; Pro adds AVIF, JPEG XL, TIFF, ICNS, PDF, SVG, and APNG.

Limitations: No crop editor, batch rename, or watermarks. The free tier is limited to 25 compressions a day and one custom preset after a 7-day Pro trial. Folder watching and clipboard compression need Pro.

Pricing: Free tier; Personal $29.99 (2 devices); Team $129.99 (10 devices). One-time, with lifetime updates.

Bottom line: If your pain is "I keep forgetting to compress images," Zipic's automation is the fix.

4. Compresto: best for images, video, and documents

Best for: Teams who compress a mix of images, videos, PDFs, and EPUBs.

Compresto is the broadest tool here and one of the most actively developed, with releases into October 2026. Beyond images (JPEG, PNG, WebP, HEIC, TIFF, GIF), it compresses video, PDFs, and EPUBs. Recent versions added resizing, format conversion to PNG, JPG, WebP, and AVIF, quality presets, folder monitoring, a Raycast extension, and AI-assisted file renaming.

Limitations: No crop editor or watermarks. Compression control is preset-based. If you only work with images, you're paying for video and document features you won't use. There's no traditional free trial, only a free web demo of the compressor.

Pricing: $49 one-time (1 Mac), $69 (2 Macs). Also on Setapp.

Bottom line: The right call if video and PDFs are part of your weekly workload.

5. Optimage: best perceptual compression

Best for: Squeezing the most out of every file with quality metrics that model human vision.

Optimage analyzes each image and compresses harder where your eye won't notice. Its published benchmark rates 100% of its outputs as visually lossless, vs 48% for TinyPNG, 44% for ImageOptim, and 29% for Squash. It also does batch resizing (Lanczos), broad format conversion (including video), configurable renaming, double-compression detection, Finder and Sketch integration, and a CLI.

Limitations: No crop editor, presets, or watermarks. Development appears dormant. The last dated release in its version history is from November 2021.

Pricing: $15; a free tier allows 24 images a day.

Bottom line: Excellent compression engine and broader than its reputation suggests. Weigh the lack of recent updates before you depend on it.

6. Squash: best for photographers who want filters

Best for: Photographers and creators who want filters and watermarks alongside compression.

Squash from Realmac Software combines batch resizing and compression with photo filters (8 built in, more in paid Effect Packs), layered watermarks, metadata removal and editing, renaming, HEIC-to-JPG conversion, custom presets, and Shortcuts support.

Limitations: Sold as an annual subscription, unusual for a utility. Realmac's site doesn't list AVIF or WebP output, folder watching, or a crop editor.

Pricing: Annual subscription with Personal (1 Mac), Studio (2 Macs), and Business (3–5 Macs) tiers. Check Realmac's site for current prices. Also available on Setapp.

Bottom line: The creative option, if filters are part of your look and a subscription doesn't bother you.

7. TinyPNG: best web tool and API

Best for: WordPress sites and developers who want compression in a pipeline.

TinyPNG's free web tool now handles batches of up to 20 images (5 MB each) in JPEG, PNG, APNG, WebP, AVIF, and JPEG XL, with a few free format conversions. The ecosystem is the draw: a WordPress plugin that compresses on upload, and the Tinify API (500 free images a month, then pay per image) that also resizes and crops.

Limitations: Your images are uploaded to TinyPNG's servers. The web tool can't resize, and there's no control over compression settings. Larger files and unlimited conversion need a paid web plan.

Pricing: Free web tier; Web Pro and Web Ultra billed yearly; API pay-as-you-go after 500 free images a month.

Bottom line: Indispensable for WordPress. For regular batch work on a Mac, a local app is faster and keeps files private.

8. Squoosh: best for comparing codecs

Best for: Deciding between, say, WebP at 75% and AVIF at 60% for one important image.

Squoosh from Google Chrome Labs runs entirely in your browser. Drag a slider between original and compressed versions while switching codecs (MozJPEG, OxiPNG, WebP, AVIF, JPEG XL) and quality settings. It also resizes. Nothing is uploaded.

Limitations: One image at a time, with no batch processing, presets, or automation. The code hasn't changed since August 2024.

Pricing: Free and open source.

Bottom line: Use it to choose your settings, then use a batch tool to apply them.

Honorable mention: command-line tools

ImageMagick, cwebp, avifenc, and cjxl offer total control and slot into build pipelines. The trade-off is no visual feedback and a command for everything:

brew install imagemagick
magick input.png -resize 1200x -quality 75 output.webp

A GUI tool complements a CLI pipeline well: scripts for automated builds, an app for ad-hoc batches where you want to see the result.

Feature comparison

Checked October 8, 2026. "—" means not offered or not listed on the official site.

Which one should you use?

• You prepare images for the web, apps, or clients on a regular basis → ImageCrush. Save a preset per output (blog images, social crops, client proofs) and every batch is one drag. See how it handles batch resizing, WebP conversion, and watermarking.
• Your files are already the right size and format → ImageOptim. Free, instant, no setup.
• You want compression to happen automatically → Zipic.
• You compress video and PDFs too → Compresto.
• You want the most aggressive visually lossless compression and can live with an unmaintained app → Optimage.
• You want filters with your exports → Squash.
• You run WordPress or need an API → TinyPNG.
• You're choosing settings for one hero image → Squoosh, then batch with something else.

Frequently asked questions

What is the best free image optimizer for Mac?

ImageOptim is the best free image optimizer for Mac. It's open source, compresses JPEG, PNG, GIF, and SVG files with no configuration, and runs locally. Its last release was in October 2023, but it still works on current macOS. Squoosh is the best free option for format conversion, one image at a time in the browser. Zipic and Optimage both have free daily tiers.

Is ImageOptim still maintained in 2026?

ImageOptim's last release, version 1.9.3, shipped in October 2023. Its source repository still receives occasional small commits, but no new version has been released since. It works on macOS 11 and later and still compresses JPEG, PNG, GIF, and SVG well. It doesn't resize or convert formats, and that's unlikely to change.

Which Mac image optimizers can resize images?

As of October 2026: ImageCrush, Zipic, Optimage, Squash, and Compresto all resize in batches. Squoosh resizes one image at a time, and TinyPNG resizes only through its API. ImageOptim doesn't resize. Of these, only ImageCrush also has a crop editor for cropping a whole batch to an aspect ratio.

Should I use WebP or AVIF for web images?

WebP is the practical default. In our benchmark at 75% quality, WebP averaged 245 KB vs 618 KB for JPEG on screenshots, and every current major browser supports it. AVIF compressed further in every category we tested (224 KB on the same screenshots) but encodes more slowly. Many sites serve AVIF with a WebP fallback. See our full format benchmark.

Do I need a desktop app, or is TinyPNG enough?

TinyPNG's free web tool is fine for up to 20 images at a time if you don't mind uploading them. For regular work, a native Mac app is faster and private: files never leave your Mac, there are no batch or file-size caps, and you get resizing, conversion, and presets that the web tool doesn't offer.

How do I compress images on Mac without losing visible quality?

Use a tool with an adjustable quality setting and a preview. For most web images, around 75% quality in WebP or JPEG produces files 60–80% smaller with no visible difference at normal viewing size. Resizing to the dimensions you actually display usually saves even more. ImageCrush shows a before/after slider so you can check before exporting. See how to compress images on a Mac.

Is there a free batch image optimizer for Mac?

Yes. ImageOptim is completely free with no limits, for JPEG, PNG, GIF, and SVG compression. Zipic (25 images a day) and Optimage (24 a day) have free tiers with more features. ImageCrush has a 7-day free trial with every feature unlocked.

How do I convert images to WebP on Mac?

macOS's built-in tools (Preview and Finder's Convert Image) don't export WebP. Batch options include ImageCrush, Zipic, Optimage, and Compresto. TinyPNG converts in the browser, and Squoosh converts one image at a time. Here's how to batch convert images to WebP on a Mac.

Further reading

• WebP vs AVIF vs HEIC vs JPEG vs PNG: Which Format Should You Actually Use?: our benchmark across 120 exports and 5 formats
• Best ImageOptim Alternatives for Mac: matched to what ImageOptim can't do
• ImageCrush vs ImageOptim: head-to-head
• web.dev: Image performance: Google's guide to image optimization
• Official sites: ImageOptim · Zipic · Optimage · Squash · Compresto · TinyPNG · Squoosh