Compress and convert images online
Drop your JPG, PNG, WEBP or HEIC photos, choose the compression level or the output format, and download individually or as a single ZIP.
Compress your photos in 3 steps
Upload your images
Drop one or several JPG, PNG, WEBP or HEIC photos into the upload zone.
Adjust quality or format
Move the compression slider or pick the format you want to convert to.
Download the result
Download each image separately or all of them together as a ZIP file.
Compress images online: the complete guide
Photos straight out of a modern camera or an iPhone often weigh several megabytes — far more than a website, an online store, or an email attachment actually needs. Compressing an image means reducing its file size while keeping an acceptable level of visual quality, achieved by tuning the encoding algorithm of the format (for example, how much color information is discarded in each 8×8-pixel block in JPG) without changing the image's resolution.
Lossy vs. lossless compression
JPG and lossy WEBP sacrifice a small amount of detail — usually imperceptible to the eye below 15-20% compression — in exchange for cutting file size by up to 80%. PNG, on the other hand, is a lossless format: it compresses by reorganizing data, but never discards information, so the size savings are smaller. For photographs (landscapes, portraits, product shots), WEBP or JPG at 70-85% quality is usually the best balance of size and sharpness. For screenshots, logos, or images with text and hard edges, PNG preserves outlines better.
When should you use "convert format"?
Besides compressing, this tool also lets you convert the output format. That's handy when:
- Your iPhone saves photos as HEIC and you need JPG or PNG for a website, store, or form that doesn't accept HEIC.
- You want to turn heavy PNG files (screenshots, designs) into WEBP, the modern format Google recommends for faster page loads.
- You need a JPG with a white background from a PNG with transparency, for example for a product listing on a marketplace.
Batch processing and ZIP download
You can drop several images at once. Each one is processed independently and you'll see its own progress in the file list. When it's done, download each result separately or click "Download all" to get a single ZIP file with every processed image — handy when working with product catalogs or full photo galleries.
Privacy: why your photos never leave your device
Unlike most online compressors, which upload your image to a server to process it, this tool runs the compression engine directly in your browser using JavaScript. That means not even we ever see your photos: the file is read, re-encoded and downloaded without ever leaving your computer or phone. That matters especially if you're working with photos that carry personal data or embedded GPS location, since that file never travels over the internet.
Tips for better results
If you're posting to social media, 70-80% quality is usually indistinguishable from the original and cuts file size in half or more. For printing, keep quality above 90% or use PNG. If your priority is a specific maximum size (say, a form's upload limit), use the "target size" mode instead of adjusting the percentage manually.