Image Compare
Compare Two Images & Pictures Online
Compare two images online, put pictures side by side, and spot even the smallest differences between photos, screenshots, and design mockups. Five viewing modes - Side by Side, Fade, Slider, Highlight, and Subtract - cover everything from a quick look at two photos to careful visual checks on a website redesign or a product image.
Both pictures stay on your own computer. The comparison happens right in your browser, which means you can safely look at unreleased designs, private photos, medical imagery, or anything else you'd rather keep off someone else's servers. No watermarks on the exports, no analytics hidden in the background, no cache, nothing kept once you close the tab.
Five Ways To Compare Images, Pictures, And Photos
Different questions about two pictures call for different views. Pick the mode that fits what you're trying to see, whether that's a side-by-side photo comparison, a picture comparison with blending, or a pixel-level image diff. Switch between them freely without re-uploading your pictures.
Side By Side
Puts both pictures in two panels next to each other. The quickest way to scan for changes in layout, composition, or framing when you just want a simple before-and-after view.
Fade (Opacity Overlay)
Stacks the two images on top of each other and blends between them with an opacity slider. Perfect for finding small changes in the same scene, since one picture dissolves into the other as you drag the slider.
Slider (Swipe Reveal)
Places both pictures in the same frame and lets you drag a vertical divider to reveal one beneath the other. The classic before-and-after view photographers and designers rely on to show changes at a glance.
Highlight (Glow Diff)
Every pixel that differs between the two pictures gets lit up in bright magenta while the rest of the image is dimmed. The fastest way to answer the question 'what actually changed?' on a busy or detailed picture.
Subtract (Pixel Difference)
Subtracts one picture from the other, so identical areas turn black and differences show up as their colour difference. Useful for catching compression artefacts, hidden watermarks, or small shifts that blend into the rest of the image.
Every Common Image Format Is Supported
PNG, JPEG, WebP, GIF, SVG, and HEIC all work straight out of the box. Mix and match formats on either side. Drop a JPEG on the left and a WebP on the right, and the comparison handles the conversion for you.
Lossless with alpha transparency
Photos and high-colour images
Modern web format, smaller than JPEG
Simple graphics and short animations
Vector graphics, rasterized for pixel diff
Apple device photos, iOS and macOS
How To Compare Two Pictures Or Photos Online
Four simple steps to compare two images, compare pictures, or run a side-by-side photo comparison. No sign-up, no installation, and nothing to wait for.
Upload The First Image
Drag your original picture onto the left panel, or click to pick it from your files. It loads straight into your browser, with nothing sent to any server.
Upload The Second Image
Drop the changed or updated picture on the right. Both images line up automatically and are ready to compare as soon as they're loaded.
Choose A Mode
Pick Side by Side, Fade, Slider, Highlight, or Subtract depending on what you're trying to see. Switch between modes freely without re-uploading the pictures.
Zoom And Inspect
Zoom and pan to look closely at any part of the image. Combining modes often helps: start with Highlight to find the changes, then flip to Slider for a clean before-and-after.
Why Pick This Free Image Comparer
Free, private, and built for everything from quick picture comparison to detailed image diff work. No accounts, no watermarks on your pictures, no branding dropped onto exports.
Instant Results
Comparison starts the moment both pictures are loaded. No Compare button to press, no processing delay, no queue. Just drop and look.
Your Images Stay Private
Pictures are compared right on your own computer, so nothing is uploaded to a server. Safe for unreleased mockups, product photos under embargo, private moments, or medical scans.
Five Comparison Modes
Side by Side for a quick scan, Fade for gentle blending, Slider for before-and-after, Highlight for spotting changes, Subtract for pixel-level analysis. Pick the view that matches the question.
Pixel-Perfect Precision
Highlight and Subtract can pick up single-pixel changes that the eye would miss entirely. Useful for watermark checks, compression audits, and careful visual testing on redesigns.
No Watermarks
Nothing stamped on your pictures, no attribution required, no branding added to exports. Images come out looking exactly the way they went in.
Works Without Internet
Once the page has loaded, you can turn the wifi off and keep comparing pictures. Useful on a flight, in a locked-down office, or anywhere you'd rather work offline.
Full Image Details
Beyond the pixels, see full image details too: resolution, DPI, colour depth, format, subsampling, interlace, orientation. Handy for catching differences that aren't visible but still matter for print or web use.
Works On Your Phone
Fully responsive on phones and tablets. Pinch to zoom, swipe to pan, and every mode works on a small screen without losing any features.
Compare Screenshots
Built to compare screenshots from redesigns, cross-browser tests, and visual regression checks. Load two screenshots, flip between Highlight and Slider, and every rendering difference shows up without a pixel-diff script to write.
What You Can Compare: Photos, Screenshots, Designs
Any two pictures you can open in a browser. Here are the situations where an image compare tool or online photo comparison tends to come in handy most often.
Photography And Editing
Retouched photos, export variations, and iterative edits. Useful for photographers reviewing their own work, and for catching changes after a batch export, a colour grading session, or a format conversion.
- Before-and-after checks on retouched photos
- Comparing compression quality
- Checking JPEG versus WebP exports
- Reviewing RAW versus processed images
- Spotting changes across colour grading iterations
Design And UI
Design iterations, brand asset reviews, and UI change tracking. Pair Highlight mode with Slider to spot small visual changes in a redesign, or use Side by Side to review two versions of a mockup at once.
- Reviewing UI and UX mockup iterations
- Comparing logos and brand assets
- Checking a Figma export against the live site
- Comparing website screenshots between versions
- Auditing email template renders
QA And Documents
Visual testing, scanned document verification, and snapshot checks across browsers or devices. Subtract mode is especially good here, since it picks up tiny rendering differences that other modes would smooth over.
- Taking visual regression snapshots
- Cross-browser rendering checks
- Verifying scanned documents
- Comparing receipts and invoices
- Diffing maps and charts across sessions
Compare Two Images Online
To compare two images online, drop the first picture into the left panel and the second into the right. Both images are loaded straight into your browser for image comparison online, with no upload to any server and no sign-up. This works as a photo comparison tool, an image difference finder, and a pixel-level image diff all in one: pick the mode that fits the question and switch between views without reloading the pictures.
The Side by Side mode is the fastest way to compare two pictures at a glance. Fade and Slider are built for before-and-after photo comparison where the framing is the same and only the contents changed. Highlight lights up every pixel that differs between the two images in bright magenta, which is the best image difference finder view for busy or detailed pictures. Subtract runs a pixel-level image diff and is useful for catching compression artefacts, watermarks, and tiny shifts that the eye would miss.
Frequently Asked Questions
What is an image diff tool?
Image diff (also known as image compare) looks at two images and shows where they differ. Unlike a text comparison, it works at the pixel level, and different viewing modes answer different questions, from a quick side-by-side scan to a pixel-level subtraction map.
Can I compare two photos side by side?
Yes. Side by Side mode puts both photos in two panels next to each other, which is the fastest way to do a quick photo comparison. It's especially useful when you want to compare 2 photos that look almost the same, like two takes from the same shoot or two versions of the same screenshot.
Can I compare two pictures or do a picture comparison online?
Yes. Drop your first picture into the left panel and your second into the right, and the picture comparison runs automatically. Five modes let you pick how the differences are shown: side by side, faded, sliding, highlighted, or pixel-subtracted.
How do I find differences between two images?
Load both pictures, then pick the mode that fits what you're after. Highlight lights up every pixel that differs between the two images in bright magenta, which is the fastest way to find small differences on a busy picture. Subtract turns identical areas black so every changed pixel stands out on its own. Slider and Fade are better for side-by-side review when you want to see both versions in context.
Is this online image compare tool free?
Yes, completely free for personal and business use. No sign-up, no daily limit, no paid upgrade, no watermarks on your pictures, and no branding stamped onto exports.
Is my data safe when I compare images here?
Yes. Both pictures are loaded straight into your browser and compared right on your own computer. Nothing is uploaded, no copy is kept on a server, and everything is cleared the moment you close the tab. That's what makes the tool a safe choice for unreleased mockups and private photos.
How does Highlight mode work?
Highlight goes through both pictures pixel by pixel and lights up every difference in bright magenta, while dimming the rest of the image. It's the quickest way to spot changes on a busy or detailed picture, since your eye is pulled straight to what's different.
What is Subtract mode used for?
Subtract takes one picture away from the other. Identical areas turn black and differences show up as their colour difference. Useful for finding watermarks, compression artefacts, and small shifts that blend into the rest of the scene.
Can I compare pictures of different sizes?
Yes. The tool lines both pictures up at the top-left corner and uses the larger dimensions. Anywhere the pictures don't overlap is treated as a difference, so a size mismatch shows up as part of the comparison.
What image formats are supported?
PNG, JPEG, WebP, GIF, SVG, and HEIC. Mix formats freely between the two sides. A JPEG on the left and a WebP on the right is a perfectly valid comparison. SVG is converted to pixels at load time so it can be compared like any other image.
Does it work offline?
Yes. Once the page has loaded, everything runs on your own computer, so you can disconnect from the internet and keep comparing pictures. All five modes, zoom, and the image details panel work offline.
What image details does the tool show?
The Details panel shows file type, file size, dimensions, DPI, colour depth, encoding format, subsampling, filter type, interlace method, and EXIF orientation. Useful for catching non-visual differences like a colour profile mismatch between two otherwise identical pictures.
Start Your Picture Comparison - Free
Scroll up and upload your images. No sign-up, no downloads, no limits.