Compress images without ruining them
Shrink JPG, PNG and WebP files right in your browser — no upload, no account, no watermark. Pick a preset or fine-tune the quality, then compare the result side by side before downloading.
Auto keeps the best format for each image. PNG output is lossless (quality slider doesn't apply).
or drag & drop images here, or paste from your clipboard
PNG, JPG, WebP, AVIF, GIF, BMP, TIFF, HEIC, SVG
Your images are processed on your device and are not uploaded to PNGful.
How it works
- 1
Add your images
Drop files onto the page, use the picker, or paste from your clipboard. Batches are welcome — everything is processed on your device.
- 2
Pick a preset or fine-tune
Balanced works for most images. Use the quality slider, format selector and resize option for tighter control.
- 3
Compare and check the savings
Flip between the original and the result, and check the size reduction before committing.
- 4
Download
Grab files one by one, or download everything as a single ZIP.
Common uses
- Photos that exceed a website's upload limit
- Email attachments that bounce back as too large
- Speeding up slow product and blog pages
- Shrinking phone photos before archiving or sharing
- Reducing screenshots for documentation and tickets
- Preparing images for CMS platforms with strict limits
How image compression works here
PNGful re-encodes your image using your browser's built-in encoders. For JPEG and WebP, the quality setting controls how aggressively fine detail is simplified — most photos can lose 40–70% of their file size before any difference is visible at normal viewing size.
PNG is a lossless format, so its size depends on dimensions and complexity rather than a quality slider. For photographic content, converting PNG to JPEG or WebP usually saves far more than any PNG optimization could.
Results vary by source: a detailed photo compresses differently from a flat-color screenshot, and an already-optimized image may barely shrink. The before/after view always shows the honest outcome.
Good to know
- Animated GIFs and animated WebPs are compressed as a single still frame — animation is not preserved.
- Metadata (EXIF, GPS) is removed by default; it can only be preserved for JPG-to-JPG compression.
- WebP output requires a browser that can encode WebP (Chrome, Edge, Firefox — not all Safari versions).
- Compression cannot make every image smaller: images that are already heavily optimized may see little change.
Your images stay private
Your images are processed on your device and are not uploaded to PNGful.All processing happens locally using your browser's own image engine — there is no upload step, no server-side queue, and nothing to delete afterwards. Read more in our privacy policy.
Frequently asked questions
Does compressing an image reduce its quality?
Lossy compression (JPG, WebP) removes detail your eye is least likely to notice. At quality 75–85, most photos look identical at normal size. The side-by-side preview lets you verify before downloading — if you can see a difference, raise the quality slider.
Are my images uploaded to your server?
No. The compressor runs entirely in your browser using its built-in image encoders. Your files never leave your device — there is no upload step and nothing for us to store or delete.
Why did my PNG barely shrink?
PNG is lossless, so the quality slider doesn't apply. If your PNG is a photo, switch the output format to JPG or WebP for dramatic savings. If it's a graphic with transparency, try WebP, which keeps transparency at a fraction of the size.
Can I compress multiple images at once?
Yes — select or drop as many files as you like. Each file is processed with the same settings, and you can download everything as one ZIP. A bounded queue keeps memory usage safe, so very large batches simply take a little longer.
What's the maximum file size I can compress?
PNGful processes images up to 256 MB and about 100 megapixels per file — beyond that, browser memory becomes unreliable. If a file is too large, the tool tells you instead of freezing the tab.
Was this tool helpful?