Batch Compress
Compress dozens of images at once. Drag, drop, download zip.
This tool compresses many images at once and hands you a single ZIP to download. Every file is processed in your browser — decoded, re-encoded, and bundled locally — so a folder of dozens of photos never uploads to any server. That makes it fast (no upload wait) and private, even for large batches.
You apply one set of rules — a quality level or a target size — across the whole set, then download everything in one click instead of saving files one by one. It's built for the moment you have a camera roll, a product gallery, or a folder of screenshots that all need to get smaller.
Drop images here or click to browse
No upload limit — runs in your browser
🔒 100% Browser-Based
Your image is processed entirely in your browser. Nothing is uploaded. Verify in DevTools → Network tab — zero outbound traffic with file content.
About Batch Compress
Compress dozens of images at once — drag them all in, set a quality, and download a single ZIP. Saves the tedium of compressing photos one by one. All processing is local to your browser.
How to use the Batch Compress
- 1
Add all your images
Drag in a whole selection of JPG, PNG, or WebP files at once. They're queued locally — nothing is sent anywhere.
- 2
Set one rule for the batch
Choose a quality level (80% is a safe default) or a target size that applies to every file, so the output is consistent.
- 3
Run the batch
The tool compresses each image in turn and shows per-file before/after sizes plus the total space saved across the set.
- 4
Download the ZIP
Grab every compressed image in a single ZIP, with original filenames preserved so you can drop them straight back where they belong.
One setting across a mixed batch
Batch compression applies the same rule to every image, which is efficient but worth understanding. An 80% quality setting is excellent for photographs but can soften screenshots of text; a tight target size that suits large photos may over-compress small thumbnails. If your batch is uniform — all product photos, all camera shots — one setting works beautifully. If it's a grab-bag of photos, logos, and screenshots, consider splitting it: run photographic images through quality-based JPEG compression and keep flat graphics or transparent logos as optimized PNG, so nothing gets the wrong treatment.
Why batching in the browser is fast
Server-based bulk compressors have to upload every file, process them remotely, and send them back — slow on big batches and a privacy concern for personal photos. Here the work happens on your own machine: files are read straight from disk into the page, compressed using your device's CPU, and zipped in memory. There's no upload progress bar and no per-file size cap imposed by a server's limits. The practical ceiling is your device's memory, so very large batches of huge images are best done in a few groups rather than hundreds at once.
Quick tips
- ✓Group similar images together — photos in one batch, screenshots or logos in another — so a single quality or format setting fits every file in the run.
- ✓For email or messaging, a per-file target of 1–2 MB keeps the whole ZIP comfortably under common attachment limits.
- ✓Filenames are preserved in the ZIP, so compressed copies slot right back into a website or folder structure without renaming.
- ✓If a batch of PNG photos barely shrinks, switch those to JPG or WebP output — lossless PNG can't compress photographic content much.
- ✓Very large batches can strain browser memory; if it slows down, split into smaller groups of images rather than loading everything at once.
Frequently asked questions
How many images can I compress at once?
There is no hard limit. Performance depends on your device, but batches of dozens of images work smoothly.
Can I mix JPG, PNG, and WebP?
Yes. Drop in any combination — each image is compressed in its own format.
How do I get the results?
All compressed images are bundled into one ZIP so you download everything with a single click.
Can I mix JPG, PNG, and WebP in one batch?
Yes. You can queue different formats together, and each is re-encoded appropriately. Just remember the single quality or target setting applies to all of them, so a batch of one image type gives the most predictable results.
Do the original filenames survive in the ZIP?
Yes. Each compressed image keeps its original name inside the ZIP, so you can extract and replace files in place without manually renaming anything.
Is there a limit on how many images I can compress at once?
There's no server-imposed cap because everything runs locally — the real limit is your device's available memory. Modest batches go quickly; for very large sets of high-resolution images, process them in a few smaller groups.