Compress images online, free and without quality loss
Large image files slow down websites, clog up email attachments, and eat storage on your phone and computer. Imagesplitter's free image compressor shrinks JPG, PNG, WebP, and AVIF files right in your browser workflow — no software to install and no account to create. You control exactly how much to compress, preview the result, and download a smaller file in seconds. Most photos can be reduced by 60–80% with no difference you can see at normal viewing sizes.
How to compress an image
- Upload your image. Drag one or more files onto the upload area, or click to browse. You can compress a batch of images at once.
- Choose a mode. Use Quality mode to set a compression level with the slider, or Target size mode to aim for a specific file size in kilobytes.
- Pick a format — or leave it on Auto and let the tool choose the most efficient option for your image.
- Compress and download. Save each result individually, or grab everything at once as a ZIP archive.
Quality mode vs. target-size mode
Quality mode is best when appearance matters most. A quality setting of 70–80% is the sweet spot for photographs: the file gets dramatically smaller while the image stays visually identical. Lower the slider further only when file size matters more than fine detail.
Target-size mode is best when a platform or form imposes a hard limit — for example "logo must be under 100 KB" or "profile photo under 2 MB." Enter the size you need and the tool works out the quality required to hit it.
Choosing the right format
- JPG — the universal choice for photographs. Excellent compression and supported everywhere, but no transparency.
- WebP — typically 25–35% smaller than JPG at the same quality, with optional transparency. Supported by all modern browsers and ideal for the web.
- AVIF — the newest format, often the smallest of all at a given quality. Great for web use where the smallest possible file is the goal.
- PNG — lossless, best for logos, icons, screenshots, and any image with sharp edges, flat colour, or transparency. Larger files, but pixel-perfect.
If you are not sure, use Auto: it keeps transparency when your image needs it and otherwise picks the most efficient format available.
Tips for compressing without visible quality loss
- Start at 75% quality and only go lower if you still need a smaller file — the last few percent rarely help and start to show.
- Resize before you compress. If an image will be displayed at 1000 px wide, there is no benefit to keeping it at 4000 px.
- Use WebP or AVIF for the web and JPG when you need maximum compatibility.
- Keep a copy of the original. Compression is lossy — always compress from the untouched file rather than re-compressing an already-compressed one.
Why compress your images?
Smaller images make websites load faster, which improves both the visitor experience and search rankings. They let you attach photos to email without hitting size limits, upload faster on slow connections, and store far more pictures in the same space. For online stores and blogs, well-compressed images are one of the simplest ways to speed up a page without changing its design.
Frequently asked questions
Is the image compressor really free?
Yes. Every tool on Imagesplitter is free to use, with no account required.
Will compressing reduce the quality of my image?
Lossy formats like JPG, WebP, and AVIF discard some data to save space, but at sensible quality settings (around 70–80%) the change is invisible at normal viewing sizes. For lossless results, use PNG.
Can I compress several images at once?
Yes. Upload a batch, compress them together, and download everything as a single ZIP file.
What happens to the files I upload?
Uploaded files are processed only to produce your result and are automatically deleted after a short retention period. See our Privacy Policy for details.
What is the maximum file size?
You can upload images up to 50 MB each.
Which format gives the smallest file?
For most photos, AVIF produces the smallest file at a given quality, followed by WebP, then JPG. For graphics with transparency or sharp edges, PNG is the safest choice even though the file is larger.