Free Image Compressor — Reduce File Size Without Losing Quality

Increase the quality slider to 85–90%. For logos or text-heavy images, keep the format as PNG rather than JPEG to avoid compression artifacts on sharp edges and flat color areas.

Some images are already well-optimized. Try enabling PNG→JPEG conversion if you're compressing PNGs, or reduce the quality slider further (down to 65–70%) for additional savings on photos.

JPEG doesn't support transparency, so transparent areas are filled with white when converting PNG to JPEG. Keep the format as PNG, or ensure the image doesn't need a transparent background before enabling conversion.

Very large source files (over 50 MB) can strain browser memory when processed simultaneously. Try compressing 5–10 files at a time, or set a Max Dimension to reduce the pixel count before compression.

No. All compression happens in your browser using the Canvas API. Your images never leave your device. This makes the tool safe for sensitive client assets, proprietary product photography, or any confidential visual content.

JPEG, PNG, and WebP are supported for input. Output formats match the input by default — JPEG stays JPEG, PNG stays PNG, WebP stays WebP. You can optionally convert individual PNG files to JPEG for extra file size savings.

You can compress up to 20 images per session, each up to 200 MB. For best browser performance, we recommend working in batches of 5–10 when processing very large source files.

For social media and web use: 75–85%. For email attachments where size matters most: 65–75%. For professional photography or print: 90%+. The quality slider only affects JPEG and WebP — PNG uses lossless compression so the slider has no effect on PNG output.

Only if you set a Max Dimension value. Leave it blank and the pixel dimensions stay identical to the original. Set it to 1200 or 1920 to cap the longest side — useful for reducing images that are unnecessarily large for web display.

PNG is a lossless format — it can only remove redundant data without changing pixel values. This limits compression ratios to roughly 10–30%. For much larger savings, enable the Convert to JPEG toggle for PNG images that don't need transparency.

Yes. WebP images are compressed using the quality slider and output as WebP. Because WebP is already an efficient format, savings may be lower than compressing JPEG or PNG from the same source — especially if the WebP was already encoded at moderate quality.

Each individual image can be up to 200 MB. There is no hard total size limit, but processing many very large files simultaneously may slow your browser. Break large batches into smaller groups for best performance.

The tool re-renders the image on a white canvas and exports it as JPEG. Transparent areas are filled with white. This is a lossy conversion — once converted, you cannot recover transparency or the exact original pixels. Always keep your original PNG source file.

No — unless you set a Max Dimension. Compression only affects file encoding and quality, not the pixel grid. The compressed image will have the same width and height as the original, or be scaled proportionally if you set a Max Dimension.

Technically yes, but we don't recommend it. Each compression pass on a JPEG degrades quality further (generational loss). Always compress from the original high-quality source, not a previously compressed version.