Image Diff — Compare Images Online (Visual Image Comparison Coming Soon to Diff Shuttle)
Image Diff
A dedicated visual image comparison tool is on the Diff Shuttle roadmap, but it is not available yet. We would rather be honest than ship a half-built feature. In the meantime, this page explains what image diffing is, when it helps, and how the free, private text and code diff tools Diff Shuttle already offers can cover related comparison work today.
How to Compare Images While This Feature Is in Development
- 1
Reach for the Source, Not the Pixels
Diff Shuttle cannot yet compare rendered pixels, but many images carry text you can compare today. SVG graphics are XML markup, and images embedded in code often appear as base64 strings. Copy the original markup or string and the modified one so you have both versions ready.
- 2
Paste Into the Text Diff
Open the Diff Shuttle home page, paste the original on the left and the modified version on the right, and choose Text Diff mode. For SVG, this surfaces exactly which paths, shapes, fills, and attributes changed — often more precise than eyeballing a rendered picture.
- 3
Review and Check Back
Read the color-coded differences, export them if you need a record, and bookmark this page. When the dedicated visual image diff feature ships, this page will be updated with full upload-and-compare instructions for raster images.
Why Image Diffing Matters
Catch UI Regressions
Visual image comparison is the backbone of UI regression testing. By diffing a baseline screenshot against a new build, teams catch unintended layout shifts and styling breaks that automated logic tests miss entirely.
Speed Up Design Reviews
When a design is iterated, reviewers need to know what actually moved. A side-by-side or overlay image diff highlights the changed regions so feedback focuses on real differences rather than guesses.
Privacy You Can Trust
Everything Diff Shuttle does today runs locally in your browser with nothing uploaded. The planned image feature is intended to follow the same approach, so sensitive mockups and screenshots would stay on your device.
Honest, Free, No Account
We will not list a feature as live before it works. The existing text, code, JSON, and CSV tools are already free with no sign-up, and image diff is intended to ship the same way when it is ready.
Common Scenarios
Comparing Two SVG Icons
Designers and developers often need to know how two versions of an SVG icon differ. Because SVG is text, you can paste both into Text Diff mode today and see precisely which path data, viewBox, or color attributes changed — a level of detail a purely visual comparison would never reveal.
Screenshot Regression Testing
A classic image-diff use case is comparing a baseline screenshot to a fresh build to catch visual regressions. This is the workflow the planned image feature is aimed at; until then, automated visual testing frameworks remain the right tool for full screenshot comparison.
Checking Embedded Image Data
Images are sometimes embedded directly in HTML or CSS as base64 data URIs. If you need to confirm whether an embedded asset changed between two files, paste both into Text Diff mode and the differing data string is flagged immediately.
Tips and Best Practices
Diff SVG as Text for Precision
When the images you care about are SVG, comparing the markup is often better than comparing pixels. Text Diff mode pinpoints the exact attribute or path that changed, which is invaluable for debugging a rendering difference.
Pretty-Print Before Diffing
If your SVG or embedded markup is on one long line, format it so each element sits on its own line before pasting. That turns a single unreadable change into a clear, line-by-line comparison.
Use a Dedicated Tool for Raster Images Today
For PNG, JPG, or screenshot comparison, a visual diff tool or a browser-based overlay is the right choice until Diff Shuttle's image feature lands. We would rather point you to what works than pretend a feature exists.
Bookmark This Page
The fastest way to know when visual image diff launches is to bookmark this page and check back. It will be updated in place with upload-and-compare instructions the moment the feature is live.
Lean on the Tools That Exist
For everything text-based — code, JSON, CSV, configs, and markup — Diff Shuttle is ready now. Reach for the home page tool whenever your comparison can be expressed as text.
Compared to Alternatives
For full visual comparison of raster images today, dedicated tools such as visual regression frameworks and browser-based image overlay comparers are the right fit, and we genuinely recommend them while our own feature is in development. We are not going to claim Diff Shuttle does something it does not yet do.
Where Diff Shuttle already wins is anything text-based. If your images are SVG, or your real question is which line of markup or which embedded data string changed, the existing Text Diff mode gives you a precise, private, line-by-line answer that a pixel comparison cannot. That covers a surprising share of real-world image-related debugging.
Frequently Asked Questions
Can Diff Shuttle compare images right now?
Not yet. A visual image comparison feature is on our roadmap. Today, Diff Shuttle compares text and code, including image-related source such as SVG markup or base64 strings, which you can diff line by line.
What is image diffing?
Image diffing means comparing two images to find where they differ visually. It is commonly used for UI regression testing, design reviews, and confirming whether a screenshot changed between two versions of a site or app.
Can I compare SVG files today?
Yes, as text. SVG files are XML, so you can paste two SVG documents into the home page and use Text Diff mode to see exactly which paths, shapes, or attributes changed in the markup.
Will image diff be free and private like the text tools?
That is the goal. Diff Shuttle runs every comparison locally in your browser with nothing uploaded, and the planned image feature is intended to follow the same free, private, no-account approach.
What can I use Diff Shuttle for in the meantime?
You can compare text, source code, JSON, and CSV right now. These cover most everyday comparison needs, and they all run privately in your browser with a free text export of the result.
How will I know when image diff launches?
Keep this page bookmarked and revisit Diff Shuttle. When the dedicated visual image comparison feature ships, this page will be updated with full instructions for uploading and comparing images.
Need to Compare Something Today?
Our text, code, JSON, and CSV diff tools are free, instant, and 100% private. No registration required.
Open the Diff Tool