Affivance Image Compressor
Compress JPG, PNG and WebP images in your browser — free, fast, and private. Your images are never uploaded.
Your images are processed locally in your browser. Files are not uploaded to Affivance or any server.
Drag & drop an image here
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Supports JPG, JPEG, PNG and WebP
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Preparing image… 0%
Target size is approximate. Extremely small targets may require significant quality reduction.
Free Image Compressor Online
Affivance Image Compressor is a free online image compressor that reduces the file size of JPG, JPEG, PNG and WebP images entirely inside your browser. Unlike many online tools, nothing you upload here ever leaves your device — there is no server-side processing and no third-party service involved.
How to Compress an Image
Drag and drop a photo into the upload area above, or click Browse Files to choose one. Pick a target size — or a preset like 100 KB or 200 KB — then click Compress Image. Once processing finishes, compare the before and after previews and click Download to save the result.
How to Compress JPG Images
JPG and JPEG images compress well because JPEG uses adjustable, lossy quality settings. The tool automatically searches for the highest quality level that keeps the output close to your chosen target size, so you get the smallest acceptable file rather than guessing a quality percentage yourself.
How to Reduce Image Size to 100KB
Select the 100 KB preset (or type 100 into the target size field), then compress. Most everyday photos can reach around 100 KB with a good balance of quality and size; very large or highly detailed originals may need a slightly larger target to stay visually clean.
How Image Compression Works
Image compression removes data that is less noticeable to the eye. Lossy formats like JPEG and WebP discard fine detail and color information at higher compression levels. Lossless formats like PNG only remove redundancy, which is why PNG files often stay larger at very small targets.
JPG vs PNG vs WebP
JPG suits photographs and works well at small file sizes. PNG suits graphics, logos and images that need transparency, but compresses less aggressively since it is lossless. WebP often produces smaller files than both JPG and PNG at similar visual quality and supports transparency, though a small number of older browsers and tools do not fully support it.
Image Compression Without Uploading Files
This tool performs every step — reading the file, resizing, re-encoding and generating the download — using your browser's built-in Canvas and Blob APIs. Your image is only ever held in your browser's memory for the current session and is never transmitted to Affivance or any other server.
Tips for Reducing Image File Size
- Choose JPEG or WebP for photos; reserve PNG for graphics that need transparency or sharp edges.
- Pick a realistic target size for the image's content — a highly detailed photo needs a larger budget than a simple graphic.
- Compress images close to the display size you actually need, rather than shrinking an oversized original at full resolution.
- Compare the before and after previews before downloading to make sure quality is still acceptable for your use case.
Frequently Asked Questions
An image compressor reduces the file size of a photo or graphic by adjusting its quality, encoding and sometimes its dimensions, while keeping it visually usable. This lets pages load faster and saves storage space.
It uses your web browser's built-in Canvas and Blob APIs to re-encode your image at a lower quality or size directly on your device. No image data is sent to any server during this process.
No. The tool never uploads your image anywhere. Selecting, previewing, compressing and downloading all happen locally inside your browser tab.
Yes. JPG and JPEG files are fully supported, and quality is adjusted automatically to approach your chosen target size.
Yes. PNG files are supported. Because PNG compression is lossless, very small targets may require converting to JPEG or WebP, which the tool will suggest when relevant.
Yes, in browsers that support WebP encoding. If your browser cannot create WebP files, the tool automatically falls back to JPEG and lets you know.
Yes. Enter or select 100 KB as your target size and the tool will search for a quality level that produces output close to that size.
Yes. 200 KB is within the supported target range and works the same way as any other target size.
Yes. 500 KB targets are supported and usually require very little quality reduction for typical photos.
Some quality loss is a normal part of reducing file size, especially for JPEG and WebP. The tool searches for the highest quality that still meets your target size, so the loss is kept as small as possible.
Yes, this tool is free to use with no account, watermark or upload limit imposed by the server, since all processing happens in your own browser.
If an image cannot realistically reach your exact target without becoming visually unusable, the tool produces the smallest reasonable result it can and clearly shows you the actual size achieved instead of a false number.