Image tool · no upload

Browser Image Compressor

Compress JPG, PNG, or WebP images locally. Resize, convert format, preview output size, and download without uploading files.

Drop an image here

or click to choose a file

Preview

Original-
Output-
Saved-

The selected image is decoded and compressed in this tab. It is not uploaded by this tool.

✓ Browser-local processing ✓ No file upload to server ✓ No account required ✓ Works offline after load

How to use Browser Image Compressor

  1. Drop an image file onto the drop zone (JPG, PNG, WebP, GIF, BMP supported).
  2. Choose your Output format — WebP gives the smallest file size for photos; PNG is best for screenshots with text.
  3. Adjust the Quality slider. 0.70–0.80 is a good balance for photos.
  4. Use the Scale slider to reduce pixel dimensions at the same time.
  5. Click Compress — the Preview panel shows the output and the savings percentage.
  6. Click Download to save the compressed file directly to your device.

Common use cases

🌐
Web & Blog Images

Reduce hero images and blog thumbnails below 200 KB to help reduce page weight and support Core Web Vitals optimization work.

📤
Email Attachments

Shrink photos before attaching to emails. Most providers cap attachments at 10–25 MB total.

📱
Social Media Upload Prep

Pre-compress images before posting on Instagram, X, or LinkedIn to preserve quality that platforms sometimes degrade on re-encoding.

🔒
Sensitive Images (No Upload)

Medical records, legal documents, or private screenshots that cannot be sent to third-party compression services — processed locally here.

Frequently Asked Questions

Does this tool upload my images to a server?

No. Your images are decoded and processed entirely within your browser using the Canvas API. No image data is sent to any server at any point.

Which image formats are supported?

Input: JPG, PNG, WebP, GIF, BMP. Output: JPEG, WebP, or PNG. WebP output typically achieves 25–50% smaller files than JPEG at equivalent quality.

Can I use this tool offline?

Yes. Once the page is loaded in your browser, all compression runs locally. No internet connection is required to process your images.

Is there a maximum file size limit?

No server-side limit applies since files never leave your browser. Very large images (20 MB+) may be slow depending on your device RAM. For batch compression, try the Bulk Image Resizer.

Related tools

🖼️
Bulk Image Resizer Resize batches of images for YouTube, Instagram, TikTok, and more.
🔄
Bulk WebP & AVIF Converter Convert multiple images to modern formats in one local batch.
📄
JPG to PDF Converter Combine images into a single PDF locally, no upload needed.