Best ImageOptim Alternatives for Mac in 2026: 6 Tools That Fill the Gaps

TL;DR: ImageOptim is still the best free image compressor for Mac — but it can't resize, convert formats, crop, or save presets. If you need any of those, here are the best alternatives:

Need	Best alternative	Price
All-in-one pipeline (resize + crop + convert + compress)	ImageCrush	$14.99
Automation (folder monitoring, Shortcuts, Raycast)	Zipic	$29.99
Best compression-to-quality ratio	Optimage	~$15
Creative filters + watermarks	Squash	~$45/year
Images, video, and PDF in one app	Compresto	$49
Free browser-based codec comparison	Squoosh	Free

What are the best ImageOptim alternatives for Mac? The best ImageOptim alternative for Mac in 2026 is ImageCrush ($14.99, one-time) for users who need resize, crop, format conversion, and compression in a single batch operation with reusable presets. Zipic ($29.99) is the best alternative for automation workflows with folder monitoring and Shortcuts integration. Optimage (~$15) is the closest to ImageOptim's compression-focused philosophy but with perceptual quality analysis. For a broader comparison of all Mac image optimizers — including ImageOptim itself — see our full roundup of the 8 best image optimizers for Mac.

Why People Switch From ImageOptim

ImageOptim defined Mac image optimization. Drag images in, they get smaller, done. It's free, open source, and for JPEG and PNG compression specifically, it's still excellent. There's a reason developers have recommended it for over a decade.

But workflows have changed. Images account for roughly half the total weight of a typical web page, according to the HTTP Archive. Modern web projects need WebP output (which delivers 25–34% smaller files than JPEG at equivalent quality, per Google), batch resize to specific dimensions, aspect ratio cropping for social media, and repeatable presets across projects. ImageOptim doesn't do any of that — and as of March 2026, hasn't added major features in years.

Here's what's missing:

Feature	ImageOptim	What you probably need
Resize	—	Max dimension constraints, specific widths for responsive images
Format conversion	—	WebP, HEIC, and AVIF output for modern browsers
Crop editor	—	Aspect ratio crops for social media, hero images, thumbnails
Presets	—	Save settings for repeatable workflows across projects
Batch rename	—	Clean file naming for CMS uploads and SEO
Watermarks	—	Proof images for client delivery
Retina export	—	@1x/@2x/@3x variants for app development
Shortcuts / automation	—	Folder monitoring, macOS Shortcuts, Raycast integration

If you only need compression — making existing JPEGs and PNGs smaller without changing format, size, or anything else — ImageOptim is still the right tool. It's free and it works. But if your workflow has grown beyond that, one of these alternatives will save you time.

The Best ImageOptim Alternatives

1. ImageCrush — Best All-in-One Alternative

Best for: Users who've outgrown ImageOptim's compression-only workflow and need resize, crop, format conversion, and presets in a single app.

What it does that ImageOptim can't: Everything in the gaps table above. ImageCrush combines crop (20+ aspect ratios with rule-of-thirds grid), resize (max dimension constraints), format conversion (JPEG, PNG, WebP, HEIC, AVIF), compression with adjustable quality, batch rename, watermarks, and Retina export — all in one batch operation. The preset system lets you save any combination of settings and chain multiple presets into sequences for multi-format export. Need every image as a 1200px WebP at 75% and a 600px thumbnail JPEG at 60%? One drag, one click.

Processing is 100% local using Apple's native frameworks — no uploads, no cloud, fully sandboxed. Like ImageOptim, your images never leave your Mac.

ImageCrush's per-image crop editor — choose from 20+ aspect ratio presets or freeform crop each image individually before batch export.

Limitations: No CLI or macOS automation features — no Shortcuts integration, no folder monitoring, no Raycast extension. macOS 15.7+ required.

Pricing: $14.99 one-time purchase. 7-day free trial with full functionality. Download the free trial.

Bottom line: The most complete replacement for ImageOptim. If you find yourself using ImageOptim for compression and then a second tool for resize or format conversion, ImageCrush replaces both.

2. Zipic — Best for Automation

Best for: Users who want images optimized automatically without manual intervention — the "set it and forget it" alternative to ImageOptim's drag-and-drop workflow.

What it does that ImageOptim can't: Zipic adds format conversion (WebP, HEIC, AVIF, JPEG-XL in Pro), custom presets, and a deep automation layer: folder monitoring with custom rules compresses new files in watched directories without manual action, clipboard auto-compression optimizes images on your clipboard automatically, Notch Drop lets you drag images to the MacBook notch for instant compression, and integrations with Apple Shortcuts and Raycast bring compression into any workflow.

Limitations: No resize. No crop editor. No batch rename. The free tier limits you to 25 images per day. If you need to resize or crop images before compressing, you'll need another tool in the chain.

Pricing: Free (25 images/day), Personal $29.99 (2 Macs), Team $129.99 (10 Macs). One-time purchase.

Bottom line: Zipic is the answer if your biggest complaint about ImageOptim is the manual drag-and-drop workflow. Folder monitoring and clipboard auto-compression mean images get optimized without you thinking about it.

3. Optimage — Closest to ImageOptim's Philosophy

Best for: Users who love ImageOptim's focused approach but want smarter compression with perceptual quality analysis.

What it does that ImageOptim can't: Optimage takes a science-driven approach to compression. Rather than applying uniform settings, it analyzes each image using perceptual quality metrics that model human vision — keeping detail where your eye would notice loss and compressing harder where it won't. The developer reports up to 90% file size reduction while maintaining "visually lossless" results. In published benchmarks, Optimage scored 100% on perceptual quality while ImageOptim scored 44%. It also adds smart double-compression detection, automatic chroma subsampling, ICC profile management, Finder integration, and a CLI for pipeline use.

Limitations: Like ImageOptim, Optimage is focused purely on compression — no resize, no crop, no presets, no watermarks, no batch rename. Limited format conversion. If you need more than better compression, Optimage fills a narrow gap.

Pricing: ~$15 one-time purchase.

Bottom line: The closest in spirit to ImageOptim — focused, minimal, compression-first — but with measurably better quality-to-size results. Think of it as ImageOptim with a better compression engine.

4. Squash — Best for Creative Workflows

Best for: Photographers and content creators who want batch processing combined with filters, watermarks, and creative effects alongside optimization.

What it does that ImageOptim can't: Squash adds resize, format conversion (WebP, HEIC input), analog camera-style filters you can apply across hundreds of images at once, watermarks with text and logo placement, EXIF metadata editing, presets, and Apple Shortcuts integration. It occupies unique territory as both an optimizer and a light creative tool — useful for photographers batch-processing client galleries who want consistent filters applied alongside compression.

Limitations: Subscription pricing — unusual for a utility app and a departure from ImageOptim's free model. No AVIF support. No folder monitoring for automated workflows. Less granular compression control than Optimage or Zipic.

Pricing: Free download with limited features. ~$45/year or ~$4.50/month for full access.

Bottom line: The best alternative if you want creative effects alongside optimization. The subscription pricing may be a dealbreaker for users who liked that ImageOptim was free.

5. Compresto — Best Multi-Format Tool

Best for: Users who compress images, video, animated GIFs, and PDFs — and want one app instead of separate tools for each.

What it does that ImageOptim can't: Compresto handles image, video, animated GIF, and PDF compression through a single drag-and-drop interface. If your workflow involves optimizing product photos alongside demo videos and PDF slide decks, Compresto handles everything without switching apps. It adds folder monitoring and a Raycast extension for quick access. All processing is local.

Limitations: Image-specific features are limited — no resize, no crop, no format conversion, no presets, no watermarks. No granular quality sliders. No free trial — the installer downloads dependencies like FFmpeg before presenting the license screen. If you only need image optimization, you're paying for video and PDF capabilities you won't use.

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

Bottom line: Makes sense if you regularly compress video and PDF alongside images. For image-only workflows, the other alternatives on this list offer more image-specific features per dollar.

6. Squoosh — Best Free Browser Alternative

Best for: Quick one-off codec comparisons when you need visual feedback before committing to batch settings.

What it does that ImageOptim can't: Squoosh, from Google Chrome Labs, adds what ImageOptim fundamentally lacks: format conversion and visual quality comparison. The split-view interface lets you drag a slider between the original and compressed version while switching between codecs (MozJPEG, OxiPNG, WebP, AVIF, JPEG-XL) with adjustable quality settings. It runs entirely in-browser via WebAssembly — images never leave your device.

Limitations: Processes exactly one image at a time. No batch capability. No presets, no automation, no macOS integration. The browser environment limits processing speed. This is an exploration tool, not a workflow tool — use it to figure out your ideal settings, then switch to a batch tool to apply them.

Pricing: Free and open source.

Bottom line: Use Squoosh to answer "what format and quality should I use?" then use a batch tool to apply those settings at scale. It complements ImageOptim rather than replacing it entirely.

Feature Comparison: ImageOptim vs. Alternatives

How each alternative fills the gaps ImageOptim leaves:

Feature	ImageOptim	ImageCrush	Zipic	Optimage	Squash	Compresto	Squoosh
Batch compression	✓	✓	✓	✓	✓	✓	—
Resize	—	✓	—	—	✓	—	Single
Crop editor	—	✓	—	—	—	—	—
Format conversion	—	✓	✓	Limited	✓	—	✓
WebP output	—	✓	✓	—	✓	—	✓
AVIF output	—	✓	Pro	—	—	—	✓
HEIC output	—	✓	✓	—	Input only	—	—
Presets	—	Sequences	✓	—	✓	—	—
Batch rename	—	✓	—	—	—	—	—
Watermarks	—	✓	—	—	✓	—	—
Retina export	—	✓	—	—	—	—	—
Folder monitoring	—	—	Pro	—	—	✓	—
Shortcuts / Raycast	—	—	Both	—	Shortcuts	Raycast	—
CLI / API	✓	—	—	✓	—	—	—
Local processing	✓	✓	✓	✓	✓	✓	✓
Video / PDF	—	—	PDF (Pro)	—	—	✓	—

Pricing at a Glance

Tool	Price	Model	Free option
ImageOptim	$0	Open source	Full app
ImageCrush	$14.99	One-time	7-day full trial
Optimage	~$15	One-time	—
Zipic	$29.99	One-time	25 images/day
Squash	~$45/year	Subscription	Limited features
Compresto	$49	One-time	No trial
Squoosh	$0	Open source	Full app

As of March 2026, ImageOptim and Squoosh are the only fully free options. Among paid alternatives, ImageCrush offers the most features per dollar at $14.99 with a 7-day trial. Optimage is the cheapest paid option if you only need better compression. Zipic's free tier (25 images/day) is generous enough for light use.

Which Alternative Should You Choose?

You need resize, crop, format conversion, and presets → ImageCrush. The most complete ImageOptim replacement. One app handles your entire image optimization pipeline — no more chaining tools together.

You want automated, hands-off compression → Zipic. Folder monitoring and clipboard auto-compression mean you never manually drag images again. Pair it with another tool if you also need resize.

You want better compression quality, nothing else → Optimage. The closest experience to ImageOptim with measurably better results. Same focused philosophy, smarter engine.

You want filters and watermarks alongside optimization → Squash. Unique combination of creative tools and compression — useful for photographers processing client galleries.

You compress video, GIFs, and PDFs too → Compresto. The only tool that handles non-image formats in the same app.

You want to explore format options for free → Squoosh. The best tool for understanding compression tradeoffs before committing to batch settings.

You just need compression and nothing else → Keep ImageOptim. It's free, it works, and for pure JPEG/PNG compression it's still excellent. Don't switch unless you've hit a wall it can't solve.

Frequently Asked Questions

Is ImageOptim still being maintained in 2026?

ImageOptim remains functional on current macOS versions including Sequoia, but hasn't received significant feature updates in recent years. It still compresses JPEG and PNG files effectively using bundled open-source engines (MozJPEG, pngquant, Zopfli). However, it lacks support for modern output formats like WebP, HEIC, and AVIF, and has no resize, crop, or preset capabilities. For users who need only basic compression, ImageOptim still works well. For anything beyond that, the alternatives listed above fill the gaps.

Can I use ImageOptim and an alternative together?

Yes — and many people do. ImageOptim excels at lossless compression of JPEGs and PNGs. You can use it as a final compression pass after processing images through a tool like ImageCrush or Squash for resize, crop, and format conversion. That said, modern alternatives with adjustable quality sliders often achieve better overall compression in a single step than a two-tool workflow.

What is the best free ImageOptim alternative for Mac?

Squoosh is the best free alternative for format conversion and visual quality comparison, though it processes one image at a time. Zipic's free tier allows 25 images per day with batch processing and format conversion including WebP and HEIC. ImageCrush offers a 7-day free trial with full functionality — batch resize, crop, format conversion, presets, and compression with no limitations during the trial.

Why can't ImageOptim convert to WebP?

ImageOptim is a compression tool, not a format converter. It optimizes images in their existing format — making JPEGs smaller with MozJPEG and PNGs smaller with pngquant — without changing the file type. WebP, HEIC, and AVIF conversion requires encoding to a different format entirely, which is a different operation that ImageOptim was not designed to perform. The difference matters: in our benchmark of 120 images across 5 formats, WebP produced files 39–74% smaller than JPEG depending on content type, and AVIF went further still. For WebP conversion on Mac, ImageCrush, Zipic, and Squash all support batch output.

Do I need to pay for an ImageOptim alternative?

Not necessarily. ImageOptim itself is free and handles basic compression well. Squoosh is free for one-off format exploration. Zipic's free tier covers 25 images per day. But if you regularly process batches with resize, crop, or format conversion, the time savings of a paid tool typically justify the cost within a few uses. ImageCrush ($14.99) and Optimage (~$15) are both one-time purchases — less than the cost of the time you'd spend manually resizing and converting in Preview.