Image Converter
Convert images between JPG, PNG and WebP right in your browser — with quality control and a background colour for transparent images. Your images are never uploaded.
Image Tools
Open Tool
Image Compressor
Compress JPG, PNG and WebP images right in your browser to shrink file size while keeping good quality — your images are never uploaded.
Runs entirely in your browser — nothing you type is uploaded.
Note: the compressor itself runs in your browser and needs JavaScript enabled. With JavaScript off you can still read the guide below, but the compression controls will not appear.
How to use the Image Compressor
- Click Choose an image (or drag one onto the upload area) and pick a JPG, PNG or WebP file.
- Check the original details — dimensions and file size.
- Adjust the quality slider and, if you like, choose an output format (keep original, JPEG, WebP or PNG).
- Press Compress Image, then compare the sizes and the percentage saved.
- Press Download Compressed Image to save it, or Clear to start again.
What is image compression?
Image compression reduces the file size of a picture by storing it more efficiently. Lossy compression (used by JPEG and WebP) removes visual detail that is hard for the eye to notice, giving big size savings. Lossless compression (used by PNG) keeps every pixel exactly, so it saves less. This tool lets you re-encode an image at a chosen quality to find a good balance between size and appearance.
Why compress images?
Smaller images load faster, use less bandwidth and take up less storage. On websites they improve page speed and Core Web Vitals; in email and messaging they send quicker; and on your device they free up space. The goal is to cut the file size as much as possible while keeping the picture looking good.
JPEG compression
JPEG is ideal for photographs. Lowering the quality removes fine detail and makes the file much smaller — a quality of around 70–85% usually looks great while cutting size significantly. JPEG does not support transparency, so if you convert a transparent PNG to JPEG, the transparent areas are filled with a background colour.
PNG compression
PNG is lossless and best for graphics, logos, screenshots and images that need transparency. Because it is lossless, a quality slider does not shrink a PNG the way it does a JPEG. This tool re-encodes PNGs, but if that does not produce a smaller file it tells you honestly instead of pretending it saved space. For photos stored as PNG, converting to JPEG or WebP usually reduces the size dramatically.
WebP compression
WebP is a modern format that often produces smaller files than JPEG at similar quality, and it supports transparency. If your audience uses modern browsers, converting to WebP is a great way to reduce size further. Support for creating WebP depends on your browser; where it is available, the quality slider works just like it does for JPEG.
Quality settings
The quality slider runs from 10% to 100% and defaults to 80%. Higher values keep more detail but produce larger files; lower values save more space but can introduce visible artefacts. Quality applies to JPEG and WebP output. Try a few settings and preview the result to find the sweet spot for your image.
Image compression and website speed
Images are usually the heaviest part of a web page, so compressing them is one of the most effective ways to speed a site up. Faster pages keep visitors engaged, reduce bounce rates and can help search rankings. Compress images before uploading them, and prefer modern formats like WebP where possible.
Features
- JPG, PNG & WebP — compress the most common web image formats.
- Adjustable quality — trade size against appearance with a live slider.
- Format options — keep the original or convert to JPEG, WebP or PNG.
- Clear results — original vs compressed size and percentage saved, with a preview.
- Same dimensions — width and height are never changed.
Benefits
Because everything happens in your browser, compression is instant and completely private — ideal for photos, screenshots and confidential images you would rather not upload to a third-party service. There are no accounts, no watermarks and no limits.
Is it private?
Yes — this is the whole point. Your images are processed locally in your browser and are never uploaded, stored or shared. There is no server processing, no cloud service and no tracking. When you close the tab, nothing remains.
Frequently Asked Questions
Is the Image Compressor free?
Yes. It is completely free to use, with no account, sign-up or limits.
Are my images uploaded to a server?
No. This is the key feature of the tool: your image is read and re-compressed entirely inside your own browser using standard web APIs. It is never uploaded, stored or shared, so it is safe to use with private photos and documents.
Which image formats can I compress?
You can compress JPG/JPEG, PNG and WebP images. You may keep the original format or convert to JPEG or WebP. Quality-based compression works best for JPEG and WebP; PNG is re-encoded and may not always get smaller.
Why did my PNG not get much smaller?
PNG is a lossless format, so a quality slider does not reduce it the way it does for JPEG or WebP. If re-encoding a PNG does not shrink it, the tool tells you honestly rather than pretending it saved space — for photos, converting to JPEG or WebP usually reduces size a lot more.
Does compressing change the image dimensions?
No. The width and height are kept exactly the same. The tool only re-encodes the image to reduce its file size, it does not resize it.
Related Image Tools tools
Background Remover
Remove a solid or near-uniform background from an image in your browser and get a transparent PNG. It uses a local colour-based edge algorithm — not an AI model — and works best on product shots, logos and graphics. Your image is never uploaded.
Image Tools
Open Tool
Barcode Generator
Generate real, scannable barcodes in your browser — CODE128, EAN-13, EAN-8 and UPC-A — with checksum validation. Adjust size and colours, then download PNG or SVG. Nothing is uploaded.
Image Tools
Open Tool