Batch Image Compressor — No Upload Required
Compress an entire folder of images in one go — JPEG, PNG, WebP, and AVIF — without uploading a single file to any server. PicaPic processes everything locally in your browser and packages the results as a ZIP download.
Drop up to 20 images at once. Free to use — no account needed.
Start batch compressing →Why batch compression without upload matters
Most online batch compressors work by uploading your images to a cloud server, running compression there, and sending the results back. That means your files sit—however briefly—on someone else's machine. For designers with client work, photographers with personal photos, or anyone handling sensitive imagery, that's a problem.
PicaPic uses WebAssembly to run the same codecs a server would use, but inside your browser tab. The batch still processes in parallel — you still get a ZIP at the end — but not a single pixel ever touches a remote server.
How batch compression works in PicaPic
- Drop up to 20 images at once (JPG, PNG, WebP, or AVIF)
- Set your target format and quality once — it applies to every image
- PicaPic queues each file and compresses in parallel using Web Workers
- When done, download all files as a single ZIP — or individually
- Everything stays on your device the entire time
Batch compressors compared
| Tool | Batch support | No upload | AVIF output | ZIP download | Free |
|---|---|---|---|---|---|
| PicaPic | ✓ Up to 20 | ✓ 100% local | ✓ | ✓ | ✓ 5/day free |
| TinyPNG | ✓ (uploads) | ✗ Server-based | ✗ | Paid only | Limited |
| Squoosh | ✗ One at a time | ✓ Local | ✓ | ✗ | ✓ |
| iLoveIMG | ✓ (uploads) | ✗ Server-based | ✗ | ✓ | Limited |
| Compressor.io | ✗ One at a time | ✗ Server-based | ✗ | ✗ | Limited |
Who uses batch compression most?
- Web developers optimizing image assets before deployment
- E-commerce teams resizing and compressing product photos in bulk
- Photographers delivering web-ready galleries to clients
- Content teams compressing screenshots and blog images
- Designers exporting sliced assets for handoff
Output formats for batch compression
PicaPic supports four output formats for batch jobs:
- AVIF — best compression ratio, modern browsers (recommended for web)
- WebP — excellent quality-to-size ratio, universal browser support
- JPEG — widest compatibility, ideal for photos
- PNG — lossless, ideal for logos, illustrations, and transparency
Try batch image compression now — no signup, no files uploaded, no waiting.
Compress images in batch →