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Caesium Image Compressor
Squoosh
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FILEminimizer Pictures
DVDVideoSoft Image Convert and Resize
EWWW Image Optimizer
Advanced image optimization tool

Beyond Compare
Meld
WinMerge
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Devart Code Compare
Diff Checker
Diff Doc
A fast, precise desktop diff and merge tool for Windows, macOS, and Linux. Syntax-aware diffs, directory comparison, three-way merge, PDF comparison. Free tier available.

Which is more popular?
Based on our record, Optimage seems to be more popular. It has been mentioned 5 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | optimage.app | getdiffract.com |
| Pricing | — | |
| Platforms | — | |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Optimage and Diffract.
Diffract's answer:
Diffract is a purpose-built desktop diff tool that handles far more than plain text. A single app compares text, binary (hex view), images, PDFs, Word documents, Excel spreadsheets, ZIP/tar archives, and Git commits - all in a multi-tab interface. On top of the standard Myers diff, it offers Patience and Histogram algorithms per comparison, AST-based semantic diff that understands code structure (not just line changes), and automatic moved-block detection. It also runs fully headless as a CLI tool for use in CI pipelines.
Diffract's answer:
Diffract is purpose-built, so it supports file types (PDF, Word, Excel, archives), workflows (three-way merge, Git browsing, semantic diff), and UX features (drag-and-drop, OS context menus, in-panel editing with undo/redo, minimap, search) that e.g. an IDE's diff panel simply doesn't cover.
Diffract's answer:
Software developers and DevOps/SRE engineers who compare code, config files, and build artifacts daily. A secondary audience includes QA and release engineers who need to diff generated outputs and directory trees, and technical writers or analysts who compare Word documents, PDFs, or Excel exports without wanting a cloud-based or subscription tool.
Diffract's answer:
Flutter and Dart (cross-platform desktop UI, targeting Windows, macOS, and Linux).
Share your experience with using Optimage and Diffract. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


I use the one https://optimage.app/. Source: about 3 years ago
Optimage is a batch image compression/resize app that I use to standardise images sent to me by clients for their website. Source: about 4 years ago
I’ve found Optimage to work better, at least for me. Source: about 4 years ago
Tracking Diffract since May 2026.
When comparing Optimage and Diffract, you can also consider the following products.


Beyond Compare allows you to compare files and folders.
Compare Beyond Compare to Optimage or Diffract:

Compress your pictures up to 90% without visible quality loss.
Compare Caesium Image Compressor to Optimage or Diffract:

What is Meld? Meld is a visual diff and merge tool targeted at developers.
Compare Meld to Optimage or Diffract:

Compress and compare images with different codecs, right in your browser
Compare Squoosh to Optimage or Diffract:

WinMerge is an open source differencing and merging tool for Windows.
Compare WinMerge to Optimage or Diffract: