How to Compress PNG & JPEG Images by 80% Without Losing Visual Quality
Discover the science behind perceptual chroma quantization and how LionPress shrinks high-resolution PNG and JPG files while preserving razor-sharp edges.
Read full guide →Minimal design · Private image workshop
Compress JPG / JPEG Images Online Free
Reduce JPEG file size with adjustable quality and batch export. Images stay on your device.
Image compression workspace
Drop PNG / JPG / WebP images here, or press Ctrl+V to paste
Unlimited batch upload · Up to 50MB per image · Processed 100% locally in your browser—files never leave your device
Built for private, effortless image processing
100% Local Browser Compression
Image processing runs on your device. Files are not uploaded to LionPress servers; third-party advertising can make separate network requests.
No Login · Six Languages
Free, private image compression and conversion. Process PNG, JPG and WebP in unlimited batches locally in your browser, with no login or upload.
Smart Format Conversion & Split Compare
Keep original formats or batch convert to WebP, JPEG and quantized PNG. Inspect the result with the interactive comparison slider.
LionPress vs TinyPNG vs cloud compressors
| Capability | LionPress | TinyPNG | Traditional cloud tools |
|---|---|---|---|
| Files per batch | Unlimited; device memory applies | Plan dependent; verify current free limits | Varies by provider |
| File size | 50MB+ possible; device memory applies | Plan dependent; verify current file limits | Varies by provider |
| Image privacy | 100% local browser processing | Images uploaded to the service | Images uploaded to cloud servers |
| Processing speed | No upload wait; depends on device and image | Network transfer and service processing | Transfer, processing and possible queuing |
| Batch WebP & resize | Built in and free | Feature and plan dependent | Provider and plan dependent |
| Cost | Free, no login | Free tier and paid plans | Free tiers or subscriptions |
TinyPNG quotas and features change by plan. Check its current pricing for exact limits. Local processing time depends on image dimensions and device memory; it is not guaranteed to take milliseconds. TinyPNG
Questions about this tool
Can I tune JPG compression quality?
Yes. JPEG output starts at 76% quality. Adjust the slider and compare the result before downloading.
What settings does this page apply?
JPEG output, 76% quality and original dimensions.
How do I download a batch?
Add multiple files, wait for processing, then use Download ZIP. Browser memory limits the practical batch size.
Image compression FAQ
Are my images uploaded to a server?
No. Image compression and conversion run locally in your browser. Advertising may make network requests, but your selected image files are not uploaded.
Why can an image get much smaller and still look clear?
Re-encoding and PNG color quantization remove information that can be less noticeable at normal viewing sizes. Savings vary, and lossy settings can affect detail.
How do I batch convert transparent PNG to WebP?
Open the PNG to WebP tool, add your files, review transparent edges in the comparison preview and download the ZIP.
Are there file or batch size limits?
There is no application batch count or 5MB service limit. Files over 50MB can work, subject to available browser memory and image dimensions.
How do I compare image quality?
Open the comparison preview for a processed image and drag the center divider to inspect the original and result.
Is LionPress free and does it need an account?
The compression, conversion, resizing and ZIP tools are free to use without an account.
Image compression & performance guides
Image Optimization for Core Web Vitals: Boosting LCP & Google Search Rankings
Images account for over 60% of average webpage byte weight. Learn the exact compression workflow to pass Google’s Largest Contentful Paint (LCP) threshold under 2.5 seconds.
Read full guide →WebP vs. PNG vs. JPEG: The Ultimate Format Guide for Developers & E-Commerce
When should you keep original formats vs. converting everything to WebP? A practical comparison of compression ratios, transparency support, and browser compatibility.
Read full guide →Best Free TinyPNG Alternative in 2026: Unlimited Client-Side Batch Compression
Why upload sensitive design assets to a remote cloud server with a 20-file limit? See how 100% client-side browser compression delivers unlimited speed and total privacy.
Read full guide →