Free · No sign-up · Private
Image Compressor – Compress JPG, PNG & WebP Online
Reduce image file size for email, websites, online applications and uploads with size limits. Compress one image or a whole batch at once — pick a quality level, compare before and after, and download.
How to use the Image Compressor
- 1
Drop or choose your images.
- 2
Set the quality slider and output format (JPG or WebP).
- 3
Click “Compress all” and download the smaller files individually or as a ZIP.
Why use FreeImageConvert
100% private
Your images are processed in your browser and never uploaded to any server.
Free, no sign-up
No account, no watermark, no daily limits. Use it as often as you like.
Batch processing
Drop in dozens of images at once, process them all with one click and download everything as a single ZIP.
You control quality
Slide from maximum quality to maximum savings and see the file size instantly.
Before & after
See exactly how much each image shrank, plus the total space saved.
Frequently asked questions
How do I reduce an image's size in KB?
Lower the quality slider and compress. If it's still too large, resize the image to smaller dimensions first with our Image Resizer.
Can I compress multiple images at once?
Yes. Drop in a whole batch, set the quality once, and click “Compress all”. Download each file or everything as a ZIP.
What quality should I use?
70–80% usually gives big savings with no visible difference for photos.
Can I compress PNG files?
Yes. PNGs are converted to WebP or JPG, which are much smaller.
Related Guides & Articles
All guides →PNG vs JPG: What's the Difference and Which Should You Use?
The fundamental difference between PNG and JPG comes down to compression: PNG is lossless and supports transparency, while JPG is lossy and produces much smaller file sizes for photos. Choosing the right format makes websites faster and graphics crisper.
Read article →Format Deep DiveWhat is a PNG File? Everything You Need to Know
PNG (Portable Network Graphics) is a raster graphics file format that supports lossless data compression and full alpha-channel transparency. It was created as an open patent-free replacement for GIF.
Read article →Next-Gen FormatsWhat is WebP? The Modern Image Format for Faster Websites
WebP is a next-generation image format developed by Google that provides superior lossless and lossy compression for web images. It reduces image weight by 25–35% compared to JPG and PNG while supporting both transparency and animation.
Read article →Compression ConceptsLossy vs Lossless Image Compression Explained Simply
Lossless compression reduces file size by eliminating redundant code without altering a single pixel, while lossy compression permanently discards imperceptible visual data to achieve dramatic file size reductions.
Read article →