Compress Image
Compress a JPG, PNG or WebP image to a smaller file size by re-encoding it at the quality you choose - entirely in your browser, so the image never leaves your device.
Updated September 2026 · Written and verified by Akash Pandey
Compress Image
How to use the image compressor
- Click Choose image and pick a JPG, PNG, GIF or WebP file (or drag it onto the box).
- Adjust the quality slider - lower values mean smaller files at a cost in sharpness.
- Optionally switch the output format; converting to WebP or JPEG usually compresses better than PNG.
- Preview the compressed result and compare file sizes, then hit Download.
Compression works by decoding the image into a canvas and re-encoding it. Quality is a 0-100 scale: 60-80 is a good starting point for web photos, 80-90 for images where quality matters most, and values near 40 suit thumbnails and previews.
Frequently asked questions
Does my image get uploaded anywhere?
No. The image is decoded and re-encoded inside your browser with the Canvas API. Nothing is sent over the network, which also means there is no file-size limit.
How much can I compress an image?
It depends on the source. Photos compress a great deal (often 50-80% smaller at quality 70). Flat graphics and PNG screenshots gain less from JPEG-style compression, and converting them to WebP usually gives the best ratio.
Which output format should I choose?
WebP gives the best quality-per-byte for most images. JPEG is ideal for photos with photographic detail. PNG keeps transparency and is best for graphics with sharp edges. GIF is only worth keeping when it has animation.
Does compression lose quality?
Only if you lower the quality slider. You can keep quality at 100 for a lossless-size tradeoff (the re-encode can still differ from the source), or reuse the slider to trade sharpness for size.
Are there limits on image size?
Practical limits come from your device, not the tool. Very large images (megapixel panoramas, huge PNGs) are processed in memory, so extremely large files may be slow but still work.
Can I compress multiple images at once?
This tool handles one image at a time. If you need bulk compression, resize or batch processing is best done with the same mechanism on desktop software.
Can I compress transparent PNGs without losing the alpha channel?
Yes. When keeping PNG format, transparency is preserved. If you convert to WebP at quality 70-80%, alpha transparency is also preserved while achieving much smaller sizes.
What is the recommended quality setting for web images?
A quality value of 75-80 is typically the sweet spot for web publishing, offering an optimal balance between visual fidelity and reduced page payload.