Private Image Compressor & Resizer
Compress and resize JPEG, PNG, and WebP images directly in your browser. Reduce bandwidth consumption and optimize website assets while maintaining 100% privacy and zero server uploads.
Drop an image to compress locally (JPG, PNG, WebP)
100% processed locally in your browser — zero server uploads
Mask Client PII Before Pasting into ChatGPT
Two-way client-side token anonymization and 1-click restore.
⚙️ How This Tool Works Locally
When you use this tool on PrivacyKit, every byte is processed directly in your device RAM.
- 1. No Network Traffic: No HTTP POST or PUT requests are made to any server. Your internet can even be disconnected.
- 2. Modern Native APIs: Computation uses native HTML5 Canvas, Web Cryptography (SubtleCrypto), and client-side binary parsers.
- 3. Zero Footprint: Closing this browser tab immediately frees the memory buffer. No persistent cookies or caches remain.
💡 Frequently Asked Questions
How does client-side image compression work?
The browser decodes your image into raw pixel buffers and re-encodes it using optimized quantization parameters directly in device memory using HTML5 Canvas APIs.
Are my private photos uploaded to remote compression servers?
No. Unlike commercial compression sites like TinyPNG, PrivacyKit compresses images 100% inside your browser. No files are ever sent over the internet.
Can I convert PNG images to WebP?
Yes. You can select WebP as your target export format, which typically provides 30-50% smaller file sizes than PNG with identical visual fidelity.
Is there a limit on how many images I can compress?
No limit. You can compress multiple images concurrently without signup or rate limits.
Does compression automatically remove hidden EXIF metadata?
Yes. Re-encoding pixel raster data automatically strips all EXIF camera and GPS metadata.
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