Upload your image
Choose the photo, screenshot, graphic, or document image you want to optimize. The tool prepares your original file in a browser-based workspace.
Compare Before / After
Load two images and compare them side by side in your browser.
No upload
Local compare
Two-image viewer
—before size
—after size
—dimensions
Side by sideview mode
Comparison viewer
Ready
Before and after images
Before file—
After file—
Before type—
After type—
Compare viewer engine is active. Use side-by-side or slider mode, then export a verified PNG comparison snapshot.
Snapshot export
0%
Preparing comparison snapshot
Rendering a browser-local PNG snapshot from the current comparison view.
Before—
After—
ModeSide by side
OutputLocked
Download unlocks only after the PNG snapshot is verified. Source images are not modified.
Compare Before After Online
Compare Before After is a free online tool that helps you review the difference between an original image and an optimized or compressed result. Upload your image, run browser-based compression, compare before after views, inspect visual quality, check file size changes, and export the result when it looks right. The comparison process runs locally in your browser, so your files stay on your device.
Compare Original and Compressed Images Side by Side
Use this compare before after tool when you want to see whether an optimized image still looks clean enough before downloading or publishing it.
How to Compare Before After Images
Comparing image quality should be simple. This tool helps you check the visual difference before you commit to a smaller image file.
Compress and compare
Create an optimized result, then compare before after views to inspect detail, sharpness, color, artifacts, transparency, and overall visual quality.
Download the best result
Export the optimized image only after you are happy with the comparison. Your original file is not changed.
5 Ways to Check Image Compression Results
Compare before after views help you decide whether a smaller file is still clear enough for your website, email, upload, document, or social media post.
Review the original and compressed image next to each other for quick visual checking.
Compare original size and compressed size to see how much space was saved.
Inspect sharpness, details, colors, gradients, edges, and visible compression artifacts.
Check how the final image looks before using it on a page, email, form, or document.
Download the result only when the before after comparison looks good enough.
Private Before After Comparison in Your Browser
This browser-based compare before after tool works locally on your device. Your image is not uploaded, stored, or processed on our server. It is a privacy-friendly way to compare compression results when working with photos, screenshots, product images, website graphics, documents, client files, or personal images.
No upload
No signup
No watermark
Browser-based
Before after preview
Files stay on your device
Why Use a Compare Before After Tool?
Compression can make images smaller, but strong compression may also change visual quality. A compare before after view helps you confirm that the result is still acceptable.
Avoid over-compression
Compare the original and optimized image before downloading so you can avoid blurry details, banding, artifacts, or unwanted visual changes.
Choose better settings
Use the comparison to decide whether you need higher quality, smaller file size, a different format, or another compression level.
Publish with confidence
Check the image before using it on websites, blog posts, product pages, landing pages, email campaigns, reports, or upload forms.
Useful for Websites, Product Photos, and Image Optimization
Compare before after image previews are useful when you need a smaller file but still care about the final look.
Website images
Compare blog graphics, landing page visuals, thumbnails, product images, screenshots, and documentation images before publishing them.
Product and ecommerce photos
Check optimized product photos and catalog images before adding them to online stores, listings, galleries, or promotional pages.
Email and upload files
Review compressed photos, receipts, screenshots, forms, reports, and attachments before sending or uploading them.
Compare Before After Before Downloading
Use compare before after online when you need to check the difference between an original image and a compressed image before exporting. This tool helps you inspect image quality, file size savings, and visual changes while keeping your file private in your browser.
Use this Compare Before After tool to preview your image, check compression results, avoid over-compression, and export a new optimized image that is easier to upload, publish, share, email, or store.
Compare Before After FAQ
Answers to common questions about using this free online before after image comparison tool.
What does Compare Before After do?
It helps you compare an original image with an optimized or compressed result so you can inspect quality before downloading.
Are my image files uploaded to your server?
No. The tool runs locally in your browser. Your image file stays on your device and is not uploaded to our server.
Why should I compare before after images?
Comparing before and after helps you see whether compression created visible artifacts, blur, color changes, or quality loss before you export the final image.
Can I use this for website images?
Yes. This tool is useful for website images, product photos, blog graphics, thumbnails, screenshots, landing page visuals, and documentation images.
Does this tool change my original image?
No. Your original image remains unchanged. The tool creates a new optimized image output that you can compare and download.
Can I compare file size savings?
Yes. The tool can help you review the original file size and the compressed result so you can decide whether the size reduction is worth the visual change.
Is this online compare before after tool free?
Yes. You can use this browser-based Compare Before After tool for free without signup or watermark.
Why can large images take longer to process?
Large images can take longer because preview, compression, comparison, and export steps run inside your browser. Speed depends on file size, image dimensions, browser performance, and your device.
Learn More About Image Formats
Images can use different formats for photos, graphics, transparency, and web publishing. You can learn more from MDN’s image file type guide .
Related Image Tools
Continue working with your images using other BintoroSoft image tools.
Compress Image
Reduce general image file size with browser-based compression.
Open tool →Image Quality Slider
Adjust image quality manually and preview compression results.
Open tool →Smart Compression Presets
Choose preset compression modes for faster image optimization.
Open tool →Optimize Image for Web
Prepare images for faster websites and web publishing.
Open tool →Ready to Compare Before After Images?
Use BintoroSoft to compare original and compressed images, inspect quality, and export a smaller image directly in your browser.
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