Batch Optimize
Drop a folder of photos, download one optimized ZIP.
Drop images here or click to browse
Processing happens on your device. Nothing is uploaded.
100% Private
Files are processed locally in your browser. They never touch our servers.
Smart Defaults
Sensible settings are applied automatically. Fine tune them only if you want to.
Batch Processing
Drop multiple images at once and download everything together as a ZIP.
How to use Batch Optimize
- Drop your images onto the page, or click to pick them from your device
- Use the default settings, or adjust the options for your file type and target result
- Download the finished images one by one, or save the full batch as a ZIP
What Batch Optimize is for
Use this tool when you need a fast, private way to prepare images for websites, upload forms, email, social media, ecommerce listings, documentation or everyday sharing.
- Prepare images for websites, email, upload forms and social media.
- Process one image or a batch of images directly in your browser.
- Download finished files without creating an account or adding a watermark.
- Keep your image workflow private by avoiding unnecessary uploads.
Best practices for better results
Image optimization works best when you choose the right balance between file size, visual quality, dimensions, format compatibility and privacy. These tips help you get a cleaner result.
- Start from the original image whenever possible.
- Review the output before publishing or deleting your original file.
- Use related tools like resize, convert or metadata removal when you need a more specific result.
- Choose the right format for the job: JPEG for photos, PNG for sharp graphics and WebP for modern websites.
Bulk image compression without the upload
Most bulk image compressors have the same bottleneck: your files have to travel to their server first. Fifty photos at 4 MB each means uploading 200 MB before any compression starts, then downloading the results, all while sitting in a queue behind other people's batches. Our batch optimizer skips the trip entirely. Files are read straight from your device into your browser's memory and processed in parallel worker threads on your own hardware, so the batch starts instantly and finishes at the speed of your machine, not your connection.
How to compress images in bulk
- Drag an entire folder's worth of JPG, PNG, and WebP files onto the page
- Set one quality level for the whole set, 80 covers most jobs
- Watch each row report its own savings as it finishes
- Download files individually, or take the whole batch as one ZIP
Mixed batches are fine. JPEGs get MozJPEG grade re-encoding, PNGs get smart palette optimization, WebP gets re-encoded efficiently. You do not need to sort by format first.
Who actually needs a mass image compressor
Web developers optimizing an image directory before deploy. Bloggers clearing years of oversized media library uploads. Real estate and marketplace sellers preparing photo sets that meet listing size limits. Anyone migrating a site who just inherited a folder of 8 MB hero images. If the set needs resizing too, run it through the bulk image resizer first, then compress here for the final pass.
Related image tools
These tools solve similar image optimization problems and work the same way: locally in your browser, with no required upload.
- Compress Image: Reduce the file size of JPG, PNG and WebP images
- Compress JPEG: Reduce JPG file size with smart quality compression
- Compress PNG: Optimize PNG files losslessly for smaller downloads
- Compress WebP: Make WebP images even smaller with adjustable quality
Batch Optimize FAQ
Is Batch Optimize free to use?
Yes. Every tool on CompressImage.ca is free to use, with no signup, no watermarks and no daily limits.
Are my images uploaded to a server?
No. Processing happens locally in your browser using your own device. Your files never leave your computer or phone.
What image formats are supported?
JPG, PNG and WebP work across the main tools. AVIF and HEIC are supported in the tools that specifically mention them.