Image Compressor
Free online image compressor — reduce JPEG, PNG, and WebP file sizes without visible quality loss. 100% browser-based, no upload to any server, no signup.
Updated May 2026
Optimization Settings
Convert to WebP
25–35% smaller than JPEG at same quality
Balanced — good quality with significant savings
Your files are never uploaded anywhere. Compression runs entirely in your browser using WebAssembly and Canvas API.
100% Private
No upload to any server. Your files never leave your device — ever.
JPEG, PNG & WebP
Compress any format. Convert PNG to WebP for up to 80% smaller files.
Free & Unlimited
No file size limits, no signup required, no watermarks, no ads.
How to Compress an Image Online
Three steps, no file size limit
1. Upload your image
Drag in a JPEG, PNG, WebP, or GIF — there's no file size limit.
2. Pick your settings
Use the quality slider for JPEG and WebP, or choose lossless re-encoding vs. WebP conversion for PNG.
3. Compare and download
A side-by-side view shows the exact file size and reduction percentage before you save the result.
What This Image Compressor Does
WebAssembly + Canvas API — no server involved
30–80% smaller files
No visible quality loss at 75–85% quality settings for JPEG and WebP.
Side-by-side comparison
A draggable slider and split view show original vs. compressed, with exact size and percentage saved.
Convert to WebP
25–35% smaller than JPEG at the same visual quality, with full transparency support.
Bulk compression, up to 100 images
Process an entire batch at once, with global or per-image quality settings.
Lossless PNG re-encoding
Shrinks PNG files 5–30% with zero quality loss — ideal for logos, icons, and screenshots with text.
Reduction by Compression Type
What to expect depending on the mode you choose
When You'll Need an Image Compressor
The most common scenarios among people who use this tool
Developers and SEO teams optimizing PageSpeed
Shrink images before deploying to improve Core Web Vitals and Largest Contentful Paint.
E-commerce stores
Compress product photos in bulk without sacrificing the visual quality shoppers expect.
Email marketing
Reduce image weight to stay within the size limits Gmail, Outlook, and most ESPs enforce.
Sensitive files
Medical images, legal documents, client photos — nothing gets sent to a third-party server.
Common Mistakes — Start Here
The compressed PNG came out bigger than the original
This happens when the PNG was already optimized elsewhere. Switch to "Convert to WebP" to get a real reduction.
Quality set below 60%
Compression artifacts become visible below that point. Stay in the 75–85% range for results nobody notices.
Using lossless mode when lossy would do better
Lossless only shrinks files by 5–30%. For photos, lossy compression at 80% quality reaches 30–60% with no perceptible loss.
Why Use This Image Compressor
Unlike TinyPNG, Compressor.io, and Optimizilla — which upload your files to an external server before returning a result — this tool runs entirely in your browser using WebAssembly and the Canvas API.
There's no 20-image-per-month cap or 5 MB per-file limit like TinyPNG's free tier. Compress as many images as you need, at any size, without creating an account.
Lossy vs. Lossless Compression
Picking the right type changes the outcome
Frequently Asked Questions
No. Compression runs entirely in your browser using WebAssembly and the Canvas API. Private photos, medical images, and internal company assets never leave your device.
Further Reading
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