Image Compressor
Reduce image file size by adjusting quality and output format — JPEG, WebP, or PNG. Compress one image, or switch to Bulk mode to compress many at once and download them all as a single ZIP file. Nothing is uploaded — everything runs locally in your browser.
Why compress images
Smaller images load faster, save bandwidth, and take up less storage — especially important for websites, where image weight is often the single biggest factor in page load time.
Choosing a format
JPEG suits photos and gives the best compression for continuous-tone images. WebP often compresses even better while supporting transparency. PNG is lossless and best for graphics, logos, and screenshots with sharp edges or text.
Bulk mode
Bulk mode compresses every selected image with the same quality and format settings, then packages all the results into one ZIP file you can download in a single click — ideal for compressing a whole folder of photos at once instead of one at a time.
Common Mistakes to Avoid
Compressing a PNG expecting big savings
Solution:
PNG is lossless, so the quality slider has limited effect. For photos, converting to JPEG or WebP first usually gives far better compression.
Compressing repeatedly
Solution:
Re-compressing an already-compressed lossy image (like re-saving a JPEG multiple times) compounds quality loss. Always compress from the original source when possible.
Frequently Asked Questions
Yes, to some degree with lossy formats (JPEG/WebP) — that is the tradeoff for a smaller file. Preview the result before downloading to confirm the quality is acceptable.
No — compression happens entirely in your browser using the Canvas API.
Why compress images
Smaller images load faster, save bandwidth, and take up less storage — especially important for websites, where image weight is often the single biggest factor in page load time.
Choosing a format
JPEG suits photos and gives the best compression for continuous-tone images. WebP often compresses even better while supporting transparency. PNG is lossless and best for graphics, logos, and screenshots with sharp edges or text.
Bulk mode
Bulk mode compresses every selected image with the same quality and format settings, then packages all the results into one ZIP file you can download in a single click — ideal for compressing a whole folder of photos at once instead of one at a time.