Image Compressor
Reduce image file size while keeping visual quality
🔒 100% free · no signup · files never leave your device
Every website, app and email attachment lives under a file size budget. Upload forms often cap images at 5 or 10 MB, content delivery networks bill by the gigabyte, and Google factors page speed directly into search rankings. A single unoptimized photo straight from a modern phone can weigh 8–12 MB — large enough to stall a mobile visitor on a slow connection and push your Core Web Vitals into the red.
An image compressor solves this by re-encoding the pixels more efficiently. Our free image compressor works with JPG, PNG and WebP files and runs entirely in your browser via the Canvas API, so nothing is ever uploaded. Drag in a photo, move the quality slider, and watch an instant before/after preview with exact byte savings. Whether you need to reduce image size for a blog post, an online store listing, or an email attachment, you can compress images online in seconds without installing anything or handing your files to a third-party server.
Why use Image Compressor
Speeding up a blog or landing page
Hero images and screenshots are usually the heaviest assets on a page. Compressing them to WebP at 70–80% quality often cuts 60–80% of the weight with no visible difference.
Meeting email attachment limits
Gmail and many corporate mail servers reject messages over 20–25 MB. A quick pass through a jpg compressor brings a batch of photos back under the limit.
Preparing product photos for e-commerce
Marketplaces like Etsy and Shopify recommend specific size limits. Compressed images load faster in search results, which directly helps conversion.
Freeing up phone storage before uploading
Shrinking an album of 4K photos before backing them up or sharing them saves bandwidth and cloud storage quota.
Pro tips
- Start at 80% quality and only go lower if you still need more savings — the 75–85% range is the sweet spot where artifacts are essentially invisible.
- Choose WebP output when your audience uses modern browsers; it typically beats JPG by another 25–35% at equal quality.
- Keep PNG only for graphics that truly need transparency or sharp text; photographs are always smaller as JPG/WebP.
- Compress before uploading to your CMS — many platforms (WordPress included) make their own copies, and a smaller source means smaller derivatives everywhere.
- Compare the preview at 100% zoom on the most detailed area of the image (hair, foliage, text) to spot compression artifacts early.
How to use Image Compressor
- 1Drop or select one or more images
- 2Adjust the quality slider
- 3Compare original vs compressed size
- 4Download compressed images
Frequently Asked Questions
Are my images uploaded to a server?▾
No. Compression runs 100% in your browser using the Canvas API. Your files never leave your device.
Which formats are supported?▾
JPG, PNG and WebP input. You can compress to JPG or WebP output.
Is there a file size limit?▾
No hard limit — it depends on your device memory. Images up to 50MB usually work fine.