Free Image Compressor Online – Reduce Image Size | Tools Spark
Reduce JPG, PNG and WebP file size in seconds, with no quality loss you can see.
100% PrivateNo SignupBatch + ZIPWorks on MobileYour images never leave your device. Nothing is uploaded or stored.
Free Online Image Compressor – Reduce Image Size Without Losing Quality
Large photos slow down websites, fill up storage and fail email upload limits. This free image compressor shrinks JPG, PNG and WebP files in seconds, right inside your browser. Choose a quality level, set an optional maximum size, compress many images at once and download them individually or as one ZIP file. No signup, no watermark and no upload to any server.
About This Tool
Image Compressor by Tools Spark re-encodes your pictures using your browser's built-in image engine. Because all processing happens on your own device, it is fast and private, and it works for bloggers, YouTubers, social media creators, online sellers, students and developers alike. Smaller images mean faster page loads, better Core Web Vitals and happier visitors.
Tool Features
- Batch compression of up to 50 images at once, with live progress
- Side-by-side before and after preview for every image
- Supports JPG, PNG and WebP input, with JPG, WebP or PNG output
- Adjustable quality slider and one-click presets
- Optional resize by maximum width/height while keeping the aspect ratio
- Before and after file size, with percentage saved for every image
- Download single files or everything as a ZIP
- Copy or share your compression summary
- 100% private: no uploads, no tracking of your images
- Works on mobile, tablet and desktop
How to Use the Image Compressor
- Click the upload area or drag and drop your images into it.
- Pick an output format and move the quality slider (75% is a good balance).
- Optionally enter a maximum width or height to resize large photos.
- Click Compress Images and wait for the progress bars to finish.
- Download each image, or click Download All (ZIP).
Tips for the Best Results
- For photos, use WebP or JPG at 70–80% quality for the best size-to-quality ratio.
- For blog images, resizing to 1200–1920 px wide saves far more space than quality changes alone.
- PNG output is lossless, so savings are small. To shrink PNG files, choose WebP.
- If a compressed file would be larger than the original, the tool keeps the original so you never lose quality for nothing.
Frequently Asked Questions
Is this image compressor really free?
Yes. It is completely free, with no signup, no watermark and no daily limit.
Are my images uploaded to a server?
No. Compression runs entirely in your browser. Your files are never sent anywhere and are not saved. Blogger or other analytics services on this site may collect general visit data separately, as described in our Privacy Policy.
Will compression reduce image quality?
JPG and WebP compression is lossy, but at 70–85% quality the difference is usually invisible while the file becomes much smaller.
Why did my PNG barely get smaller?
PNG is a lossless format. Choose WebP (or JPG for images without transparency) to get much larger savings.
Does it keep transparency?
Yes for PNG and WebP output. JPG does not support transparency, so transparent areas are filled with white.
Is EXIF metadata (camera, location) removed?
Yes. Re-encoding strips metadata such as GPS location, which is also good for privacy.
How many images can I compress at once?
Up to 50 images per batch. Very large images may take longer on older phones.
Which browsers are supported?
Any modern browser: Chrome, Edge, Firefox, Safari and their mobile versions. WebP output requires a browser with WebP encoding support (Chrome, Edge, Firefox, recent Safari); otherwise the tool falls back to JPG.
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Need another image tool? Tell us in the comments below and we will consider building it for you. Tools Spark is built for creators like you.