Image compressor
The compressor resizes and re-encodes images with the Canvas API on your device. Files never go to a FlashKit server. That is why large batches depend on your CPU and RAM, not a queue on our side.
Use it before uploading hero images, blog art, or product photos. WebP usually beats JPEG at the same visual quality. PNG is best when you need a sharp logo or existing transparency — this tool does not remove backgrounds (use Transparent Image Maker for that).
How to Use
- Drop one or more JPG, PNG, or WebP files on the upload area.
- Set the quality slider. Start around 75–85% for photos; go lower only if the preview still looks acceptable.
- Pick an output format. WebP is usually smallest. Keep PNG if you must preserve transparency.
- Download a single file or the whole queue as a ZIP. Nothing is stored after you close the tab.
Key Features
- Bulk queue with per-file size before/after
- Client-side encode — files stay on your machine
- JPG, PNG, and WebP output
- No account, watermark, or daily cap from FlashKit
Frequently Asked Questions
Will compression ruin print quality?
This tool is for web and social uploads, not offset print masters. For print, keep a lossless original and export a separate web copy.
Are images uploaded to FlashKit?
No. Encoding runs in the current browser tab. If you use a work computer, remember the files still exist in that tab’s memory until you leave.
Why is PNG still large?
PNG is lossless. Re-saving PNG does not shrink photos the way JPEG/WebP does. Convert photos to WebP or JPEG; keep PNG for UI, icons, and transparency.
Is there a file-size limit?
There is no server quota. Very large images can freeze a low-memory phone. Compress a few at a time on mobile.