A Free Diffchecker Alternative for Image Comparison
For image diffing specifically — more images, more control, no account. (For text diffs, Diffchecker is still your tool.)
100% free · No sign-up · Runs in your browser
Try the image diff →Diffchecker is a solid all-round diff suite — text, PDFs, spreadsheets, folders and images. But if what you need is image comparison, a dedicated tool goes deeper: this one compares up to nine images at once (not just two), gives you threshold and cluster controls over the pixel diff, and adds modes Diffchecker doesn't have, like overlay align with pixel-precise offset and A/B flash.
It's also free without an account for everything, including exporting the diff result — and your images are processed locally in the browser rather than handled by a server.
How to use
- 1Open the tool and load two images (or up to nine).
- 2Run Pixel Diff — tune threshold and intensity, enable cluster boxes to outline changed regions.
- 3Or pick curtain slider, A/B flash, or overlay align with pixel-level offset control.
Why use this tool
Up to 9 images, not 2
Compare a whole set at once — Diffchecker's image mode is strictly pairwise.
Tunable pixel diff
Threshold, intensity, cluster boxes and diff export — not just a fixed difference view.
Overlay align
Fix small offsets between shots with arrow-key nudging before diffing.
Local processing
Images never leave your browser.
Honest comparison: this tool vs Diffchecker (for images)
| View Multiple Images (this tool) | Diffchecker | |
|---|---|---|
| Images at once | Up to 9 | 2 |
| Pixel diff controls | Threshold, intensity, cluster boxes | Basic difference / highlight views |
| Overlay align with offset | Yes (1px arrow-key precision) | No |
| A/B flash toggle | Yes | No |
| Price for image diff | Free, no account | Free tier; Pro for advanced use |
| Text / PDF / spreadsheet diff | No | Yes — its core strength |
| Folder diff, desktop app, API | No | Yes (paid tiers) |
Choose this tool when your work is visual: comparing photos, screenshots, renders or design exports — especially more than two at a time, or when you need diff threshold control and alignment.
Stay with Diffchecker when you need text, PDF, spreadsheet or folder diffs, a desktop app, or an API. This tool doesn't do any of that, and doesn't try to.
Frequently Asked Questions
Does this replace Diffchecker completely?
No — only for image comparison. Diffchecker's text, PDF, spreadsheet and folder diffs have no equivalent here.
Is the pixel diff accurate?
It compares actual pixel values with an adjustable threshold, shows a changed-pixel count, and can box each changed region. You can export the result as PNG.
Do I need an account for any feature?
No — every feature, including diff export and the 9-image grid, is free with no registration.