Bring your images.
Choose a file, a batch, or a folder. Your original files remain untouched.
THE PIKOZIP IMAGE TOOLKIT
Compress images online. Keep your format.
Reduce image file size with free batch compression. Keep PNG, JPG, WebP or AVIF, compare before and after, and download up to 30 images in a ZIP.
On-device processing
Drop your images here
Your image format stays the same. Drag and drop, or choose images below.
Up to 30 images · 10 MB per image
PNGJPEGWebPAVIF
Output settingsOriginal format · Smart compression · Original dimensionsCustomize
Image compressor
Start with the original format
One place for your PNG, JPEG, WebP, and AVIF images. Keep the original format, choose the balance you need, and download your batch without uploading image bytes to a server.
When the format and dimensions stay the same, PikoZip retains your original if encoding would make the file larger. This gives you a useful result even when an image is already well optimized.
How to compress a batch of images
Choose up to 30 static PNG, JPEG, WebP or AVIF images, with a maximum of 10 MB per file. Smart compression starts from each original and keeps its format. Open Compare to inspect text, textures and transparent edges, then download one result or the complete ZIP.
Can I compress an image to 100 KB, 50 KB or 20 KB?
Open Customize and enter a Target file size in KB. The target is a goal, not a guarantee: some images cannot reach a small limit within the selected detail checks. Read the result message, try a smaller maximum width, or explicitly use Convert if your destination accepts another format. Check the actual downloaded bytes against the receiving website’s limit.
Why a compressed image can stay the same size
An already optimized image may have little room left to shrink. When format and dimensions stay unchanged, PikoZip keeps the original if encoding would produce a larger file. Resizing and conversion are separate choices; your PNG is not silently returned as WebP.
A SIMPLE WORKFLOW
Get started with Image compressor.
Find your balance.
Set format, quality, width, and an optional target size. Compare your result.
Take the lighter route.
Download one image or the whole batch in a ZIP, with folder paths preserved.
THE DETAILS THAT MATTER
Know your result.
Are my images uploaded?
No image bytes are uploaded. Your browser fetches the image codecs, then processes your selected files locally.
Will the output always be smaller?
Savings vary. A same-format, same-dimension original is retained when it is smaller. Explicit conversions may increase file size, which the result clearly shows.
Can I keep working from the original?
Yes. PikoZip does not overwrite the source file on your device. Keep your original master and download the output as a separate file.
YOUR NEXT STEP
Keep the workflow moving.
Image format guide
Compare PNG, JPG, WebP and AVIF for photos, transparent graphics and website images. Choose a format using your actual output and compatibility needs.
Explore
Image compression explained
Understand lossy and lossless image compression, resizing and target file sizes. Learn why 100 KB is a goal and when keeping the original is the best result.
ExploreYOUR WORKFLOWHelp center
Search common image optimization questions and troubleshoot your PikoZip results.
ExploreMAKE A LITTLE ROOM
Start optimizingYour next image, a little lighter.
Choose your format. Find your balance. Take it with you.