Are images uploaded to a server?
No, all processing happens in your browser.
Main Tool
Browser Image Compressor
This is the main FastAiZip tool. Compress JPG, PNG, and WebP directly in your browser with no upload, no signup, batch support, and optional WebP export.
01
No upload
Images stay in the browser instead of going through a default upload flow.
02
Three formats
One general-purpose tool supports JPG, PNG, and WebP.
03
Built for real tasks
Useful for uploads, website assets, product images, and screenshots.
Main Tool
Image Compression Workspace
Built for smaller uploads, website image cleanup, screenshot handling, and WebP comparisons. Compress JPG, PNG, and WebP directly in the browser.
Browser + Wasm codecs enabled
JPG
PNG
WebP
When you keep the original format, PNG files and screenshots often have limited room for size reduction. Switch to WebP for higher savings.
Queue
0Imported files will appear here before compression starts.
Overview
Why this is the main tool page
This page carries the main FastAiZip tool intent rather than pretending that each image format is a separate product. The current capability is one general browser image compressor for JPG, PNG, and WebP, built around real tasks such as smaller uploads, website visuals, screenshots, and WebP comparisons. Splitting that into many fake standalone tools would dilute the content without adding real utility.
That is also why this page works better as a unified entry point. People do not usually arrive knowing they need a separate JPG page or PNG page. They arrive with a task, then decide whether to keep the original format or switch to WebP. Keeping the workflow together is usually more useful than scattering it across artificial tool pages.
Use Cases
Best-fit use cases
Smaller uploads
Reduce image size before sending files to forms, CMS tools, marketplaces, and social platforms.
Website image cleanup
Optimize blog visuals, product images, page graphics, and marketing assets.
PNG to WebP testing
If screenshots feel too heavy in PNG, compare the result after switching to WebP.
Format Choice
When to keep the original format vs. switch to WebP
Start with the original format when you want minimal workflow change. Switch to WebP when delivery size matters more, especially for screenshots and website visuals.
Photos and covers: try the original format first, then compare WebP
Screenshots and UI images: test WebP early
Editable source assets: keep the original format
Formats
Supported formats
Supported
JPG / JPEG
Great for photos, article covers, and product shots in the general image compressor.
Open image toolSupported
PNG
Best for screenshots, UI captures, transparent assets, and WebP comparisons.
Open image toolSupported
WebP
A smaller modern output for web delivery and sharing when file size matters.
Open image toolPrivacy
Privacy first
Your images are processed in your browser with no upload and no server storage. This promise is core to FastAiZip.
Browser-only processing
No upload pipeline
No server storage
FAQ
Frequently asked questions
Which formats are supported?
Phase one supports JPG, PNG, and WebP.
Does it work on mobile?
Yes, mobile and tablet browsers are supported.
Next Steps
Need Browser agent access instead?
If you need compression for Browser agents or browser automation workflows, use the dedicated guide and entry page.
Read the Browser agent guideKeep reading the guides
If you are here for uploads, website images, format decisions, or SEO work, the blog guides are the better next step.
Resources