IMAGE OPTIMIZATION
Free PNG Compressor online
Compress PNG images by reducing dimensions.
Use PNG Compressor to compress PNG images by reducing dimensions in seconds, straight from your browser. Drop your image into PNG Compressor, choose your settings, and save the finished file. PNG Compressor processes everything in your own browser, so your data never leaves your device.
- Free to use
- No signup
- No uploads
- Works offline
Why use PNG Compressor
- compress PNG images by reducing dimensions without installing software
- Your image is processed on your device by PNG Compressor, never uploaded
- PNG Compressor needs no account, email address or payment details
- PNG Compressor is batch-friendly: reuse it immediately on the next file
- PNG Compressor is keyboard accessible and screen-reader friendly
- PNG Compressor is free forever, with no watermark on the result
PNG Compressor runs entirely inside your browser. Your image is never uploaded, stored or shared, and nothing is retained once you close the tab.
How to use PNG Compressor
- Add your image Drag your image onto the drop zone or pick it from your device.
- Adjust the options Set the options that control how PNG Compressor handles your input.
- Apply the change PNG Compressor works instantly on your device, with no queue and no upload wait.
- Download the result Save the finished file straight to your device, then reuse the tool as often as you like.
Benefits
Private by design
Your image stays on your device while PNG Compressor works. PNG Compressor never sends it to a server, so confidential work stays confidential.
Instant results
PNG Compressor finishes most jobs in under a second because the work happens on your own hardware.
No signup, no limits
Use PNG Compressor as many times as you want. PNG Compressor asks for no account, adds no watermark and keeps no paid tier gating the output.
Works offline
Once the page has loaded, PNG Compressor keeps working without a connection, which helps on flights and locked-down networks.
Who it is for
For designers
Designers use PNG Compressor to prepare assets for handoff without installing software: compress PNG images by reducing dimensions on a shared or locked-down machine.
For marketers
PNG Compressor helps marketers publish campaign assets quickly, since your image never leaves the laptop it was created on.
For freelancers
PNG Compressor helps freelancers send client deliverables quickly, since your image never leaves the laptop it was created on.
How it works
PNG Compressor loads your image into memory, applies the change you requested to the underlying data rather than to a screenshot of it, and writes a fresh copy for download. Your original stays untouched on disk, and every step of PNG Compressor happens inside your browser sandbox.
Frequently asked questions
Is PNG Compressor free to use?
Yes. PNG Compressor is completely free with no account, no trial and no usage cap. Every feature on this page is available on the first visit.
Does PNG Compressor upload your image to a server?
No. PNG Compressor processes your image inside your browser, so it never reaches a DocTools server. That also means the tool keeps working if your connection drops mid-task.
Is there a file size limit?
The practical ceiling is your device's available memory rather than a server quota. Files up to roughly 100 MB work comfortably on a typical laptop in PNG Compressor.
Do I need to install anything to use PNG Compressor?
No installation is needed. PNG Compressor runs in Chrome, Edge, Firefox and Safari, on desktop and on mobile, with no extension or plugin.
Can I use PNG Compressor on a phone or tablet?
Yes. The PNG Compressor interface adapts to small screens and supports touch input, though very large jobs are faster on a desktop browser.
What happens to your image when I close the tab?
It is discarded. PNG Compressor keeps everything in temporary browser memory, so closing the tab removes every trace of the session.
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- PNG to PDF | Convert PNG images into a PDF document
- PDF to PNG | Convert PDF pages to PNG images
- Image Converter | Convert between JPG, PNG, WEBP, GIF and more
Last updated: 2026-09-07