Image compressor online
Compress JPG, PNG, and WebP images with local browser processing and download a smaller file without an upload step.
How to use
- Drag in or select JPG, PNG, GIF, or WebP images.
- Adjust quality and output format.
- Download the smaller file—processing stays in your browser.
Use cases
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Blog & CMS uploads
Reduce hero and inline image weight.
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Email attachments
Shrink photos before sending.
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Portfolio sites
Balance quality and Lighthouse scores.
FAQ
Does my image get uploaded to your servers?
No. The image is processed entirely in your browser using an HTML5 Canvas element — it never leaves your device.
Which formats are supported?
You can upload JPG, PNG, GIF, and WebP images. Output can be saved as JPEG or WebP.
What quality setting should I use?
0.85 is a good default — it balances quality and file size well for most photos. For web thumbnails, 0.70 is usually sufficient.
Why does PNG compression result in a JPEG output?
True lossless PNG compression requires a different algorithm. This tool uses the browser's Canvas API, which outputs JPEG or WebP. For lossless PNG, dedicated tools are needed.
Guides for this task
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Open Image & media tools100% Private — Your Images Stay on Your Device
Your file never leaves your device. We draw the image to a canvas and encode it with your chosen quality — perfect before uploading to a blog, shop, or social network.
JPEG vs WebP — Which Should You Choose?
Both formats use lossy compression, but WebP is a modern format developed by Google that typically achieves 25-35% smaller file sizes than JPEG at equivalent visual quality. However, JPEG remains universally supported across all browsers, email clients, and devices.
- Choose JPEG if you need maximum compatibility — for email attachments, legacy CMS systems, or sharing with non-technical users.
- Choose WebP if you are optimizing images for a modern website. All major browsers support it, and the smaller file size improves page load speed significantly.
How Image Quality Settings Work
The quality slider controls how aggressively the image is compressed. At 1.00 (100%), the output is nearly identical to the original. At 0.50 (50%), image quality degrades visibly but file sizes drop dramatically. For most website thumbnails and hero images, a quality between 0.75 and 0.85 offers the best balance — visually crisp with significantly reduced file size.
A practical optimization workflow
Start by exporting the image at its intended display size, then test compression quality. Oversized source files waste more bytes than quality settings alone. For publishing work, it helps to resize upstream, compress locally, and then review the final asset inside the page layout where text and buttons will sit around it.
What to watch before publishing
- Check fine details like text overlays or product edges after compression.
- Prefer WebP for modern sites when compatibility is not a blocker.
- Use a higher quality setting for hero images and a lower one for thumbnails or blog cards.
- Remember that transparency may be lost when exporting transparent PNGs to JPEG.
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