PixelVault’s image compressor lets you compress JPG, PNG and WebP images online without ever uploading them. Most “compress image online” tools send your photos to a server, process them there, and send them back — which means your files briefly live on someone else’s computer. PixelVault takes a different approach: the compression happens right inside your browser, on your own device, so your images never leave your machine.
You stay in control of the trade-off between size and quality. Drag the quality slider to find the sweet spot where the file is dramatically smaller but still looks great, or switch to target-size mode and tell PixelVault exactly how many kilobytes you want — it will search for the best quality that fits. A live before-and-after view and side-by-side size comparison make it obvious how much you are saving, so you never ship a blurry image by accident.
Need to compress a whole folder? Drop in as many images as you like and compress them all at once, then download them individually or as a single ZIP. Whether you want to compress a JPG for email, shrink a PNG for a website, or batch-optimize product photos, it works the same private way every time.
How it works
When you add an image, the browser decodes it into memory and redraws it onto an HTML canvas. PixelVault then re-encodes that canvas at your chosen quality using the browser’s built-in JPEG, PNG and WebP encoders. For target-size compression it runs a quick binary search over quality settings to land just under your limit. Large images are handled efficiently so the interface stays responsive.
Why local processing matters
Compressing locally is faster because there is no upload or download round-trip — results appear the moment you move the slider. It is also more private: photos often contain personal moments and embedded location data, and keeping them on your device means there is no server log, no cache, and no third party that could retain a copy. It even works offline once the page has loaded.
Supported formats
- JPG — Best for photos; adjustable quality for big savings.
- PNG — Lossless; ideal for graphics and screenshots.
- WebP — Modern format with excellent compression and transparency.
Common use cases
- Shrink photos so they attach to email or messaging apps without hitting size limits.
- Speed up a website or blog by compressing images before you upload them to your CMS.
- Reduce product or portfolio images in bulk while keeping them crisp.
- Meet upload size caps on forms, marketplaces and job applications.