Image Compressor
Compress JPG, PNG and WebP images right in your browser — pick a quality, an optional max width, or a best-effort target size — and download each compressed image individually. Free, no signup, your images never leave your device.
Note: this is browser canvas re-encoding, not professional MozJPEG or OxiPNG optimization. PNG photos compress weakly, JPG output loses transparency, animated GIFs are not supported (the first frame is what a canvas sees), and a target size is best-effort — very small targets may not be reachable without visible quality loss. Very large files may slow the browser.
What Is the Image Compressor?
A free image compressor is a tool that shrinks image files so web pages load faster, without changing what the picture shows. Choose your images, set a quality level and an optional max width or target size, and the tool re-encodes each image in your browser and reports the before and after size, the percentage saved, and a download link. If you need an image compressor for blog photos, product images or social graphics, this page does the shrinking locally, with no upload.
What Is It Used For?
Bloggers use it to cut page weight before publishing photo-heavy posts. Shop owners use it to shrink product photos for faster category pages. Developers use it to prepare assets that meet a size budget. Social media managers use it to fit platform upload limits. Anyone on a slow connection uses it to make pages open sooner.
Key Benefits
- No uploads, fully private — images are processed in your browser and never sent to a server.
- Before and after sizes — see the original size, the new size and the exact percentage saved for every image.
- Quality control — a 1–100 slider lets you trade file size against visible quality yourself.
- Max width and target size — resize while compressing, or aim for about 100, 200 or 500 KB on a best-effort basis.
- Individual downloads — each compressed image downloads separately, ready to use.
- Completely free — no signup, no limits on the number of images.
How to Use This Free Image Compressor
- Click Choose images and pick one or more JPG, PNG or WebP files.
- Set the quality slider — 80 is a good default balance; lower means smaller files and softer detail.
- Optionally set a max width (the height scales automatically) or pick a target size.
- Click Compress. Files are processed one at a time; each result shows its sizes, the saving, a preview and a download link.
- Download the compressed images and compare the preview with the original before replacing files on your site.
Common Mistakes to Avoid With Image Compression
- Compressing the only copy. Keep the original file. Compression is one-way — you cannot get the lost detail back.
- Expecting PNG photos to shrink like JPGs. PNG is a poor format for photographs; a photo saved as PNG will stay large even at low quality settings.
- Converting transparent PNGs to JPG. JPG has no transparency, so transparent areas become solid (usually black or white) — keep transparency in PNG or WebP.
- Treating a target size as a promise. The target mode lowers quality step by step to approach the size, but a detailed photo may not reach a tiny target without visible damage.
- Compressing huge files in bulk. Very large images can slow or freeze the browser tab; compress big files one at a time.
Frequently Asked Questions
Is this image compressor free? Yes, completely free — no signup, no limits, no account.
Are my images uploaded anywhere? No. Compression happens entirely in your browser via canvas, so your images never leave your device.
Which formats are supported? JPG, PNG and WebP input. Output matches the input format, except that the quality slider has no effect on PNG (PNG is lossless) — PNG savings come from resizing, not from quality.
How does the quality slider work? It sets the encoder quality for JPG and WebP from 1 to 100. Lower values make smaller files with softer detail; higher values keep detail and make larger files.
What is the target-size mode? A best-effort mode: the tool re-encodes at decreasing quality until the file is near the chosen size (about 100, 200 or 500 KB) or quality bottoms out. It is an attempt, not a guarantee.
Why did my PNG barely shrink? Because PNG compression is lossless and quality does not apply to it. For photographs, convert to JPG or WebP instead, or reduce the dimensions.
What happens to transparency in JPG output? JPG has no alpha channel, so transparent areas are filled. If your image needs transparency, stay with PNG or WebP.
Does it support animated GIFs? No. The file picker accepts JPG, PNG and WebP only; a canvas sees only a single frame of any animation, so GIF animation is out of scope here.
Is this as good as TinyPNG or Squoosh? Not quite. Those use dedicated encoders (MozJPEG, OxiPNG) that squeeze out more bytes. This tool trades that last bit of optimization for privacy and zero uploads.
Why is there no ZIP download? Batch ZIP needs an extra library, which this page does not load. Files are processed one at a time and each downloads individually.
Why does a very large image slow the browser? Because the whole image is decoded and re-encoded in memory in your tab. For huge files, compress one at a time and close other heavy tabs first.
Does compressing images improve SEO? It helps page speed, which matters for visitors and for search, but compression alone does not rank a page — content and links still do the heavy lifting.
Does it work on mobile? Yes, in any modern mobile browser, though very large images are best compressed on a desktop for speed.
Final Thoughts
Image weight is the most common reason pages feel slow, and it is also the easiest to fix. Compress here before you upload, keep your originals, and your visitors will feel the difference on every page.
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