Compress images online
Make your photos and graphics dramatically smaller without an obvious drop in quality. Choose a target quality, and In1 re-encodes the image in your browser and shows you exactly how much space you saved. Your images are never uploaded.
How to use Image Compressor
- 1
Choose an image
Drag a JPG, PNG or WebP file into the drop area, or click to select one from your device.
- 2
Set the quality
Use the quality slider to balance file size against visual fidelity.
- 3
Compress
In1 re-encodes the image in your browser and shows the original vs. compressed size.
- 4
Download
Save the smaller image. The original file is never uploaded anywhere.
Smaller files, faster everything
Large images are the number-one cause of slow web pages, sluggish email attachments and full phone storage. A single photo straight from a modern camera can weigh several megabytes — far more than it needs to for screen use. Compressing it can cut the size by 70–90% while keeping it visually crisp. Smaller images load faster, improve your site's Core Web Vitals, send more reliably over email, and let you fit far more on a device or in cloud storage.
Control quality with a single slider
Compression is always a trade-off between file size and visual fidelity, so In1 puts that trade-off directly in your hands. A quality slider lets you dial in exactly how aggressive the compression should be, and the tool reports the original size, the compressed size and the percentage saved so you can find the sweet spot. For most photos a mid-range setting removes the bulk of the weight with no perceptible difference; for thumbnails or background images you can push it further.
Private by design — nothing leaves your browser
Family photos, product shots, screenshots of sensitive information — images can be just as private as documents. That is why In1 compresses them locally using the browser's own image pipeline. The file you pick is read into memory, re-encoded and offered back to you as a download, all without a single byte being sent to a server. There is no upload progress bar because there is no upload.
Supports JPG, PNG and WebP
The compressor handles the three formats that cover the vast majority of images on the web. JPGs (great for photographs) are re-encoded at your chosen quality; PNGs (great for graphics and screenshots with sharp edges) are optimized; and WebP — the modern format that often beats both — is supported as well. The output keeps the format that makes the most sense for your image, so you get the best balance of size and quality.
Who uses an image compressor?
Bloggers and site owners compress images so their pages score well on PageSpeed and rank better. Online sellers shrink product photos so listings load instantly. Students and office workers compress scans and screenshots to slip under email attachment limits. Designers create lightweight previews to share for feedback. Whatever the reason, the goal is the same: keep the picture looking good while making the file small — and do it in seconds, for free.
Higher limits, batch processing and an API are on the way. Want early access?