About ZeroPNG
Building the fastest, safest, and most private image tools on the web.
Client-Side Processing
Uploaded to Servers
Free Forever
Meet the Developer
Ajay Shrestha
Lead Developer & Creator of ZeroPNG
I'm a web developer with a focus on building privacy-respecting tools that run entirely in the browser. I created ZeroPNG because I was frustrated with image compression tools that upload your files to external servers, exposing your photos, metadata, and GPS coordinates to companies you can't verify.
ZeroPNG is my answer to that problem: a complete image toolkit that uses modern browser APIs (Canvas, WebAssembly, Service Workers) so your images never leave your device. Every tool on this site works offline, has no file limits, and costs nothing.
Our Mission
At ZeroPNG, our mission is simple: to provide professional-grade image optimization tools that don't compromise your privacy. In an era where cloud processing is the norm and digital privacy is constantly under threat, we believe that you shouldn't have to upload your personal photos, or sensitive documents, to a remote server just to make the file size smaller.
We built ZeroPNG to run 100% in your browser. By leveraging modern web technologies like WebAssembly (WASM) and the HTML5 Canvas API, we bring the processing power directly to your device. This means your images never leave your computer, ensuring total data security and complete privacy.
How ZeroPNG Works
Transparency is central to trust. Here is exactly how ZeroPNG is built and why your data is safe:
Client-Side Architecture
Every tool runs entirely in your browser using the HTML5 Canvas API and JavaScript. When you drop an image into ZeroPNG, the file is loaded into your browser's local memory, it never crosses a network boundary. You can verify this yourself by opening DevTools → Network tab and watching for zero outgoing uploads.
Static Hosting on Cloudflare Pages
ZeroPNG is a static site hosted on Cloudflare Pages' free tier. There is no backend server, no database, no API endpoint that receives your files. The site serves HTML, CSS, and JavaScript, and your browser does the rest. This architecture makes a data breach structurally impossible because we never possess your data.
PWA & Offline Support
ZeroPNG is a Progressive Web App. After your first visit, a Service Worker caches all application code locally. You can then compress, convert, crop, and watermark images with zero internet connection. The app functions identically offline, proof that no server is involved in processing.
Compression Technology
PNG compression uses the UPNG.js library for color quantization, the same mathematical technique used by TinyPNG's servers, but executed locally. JPEG, WebP, and AVIF compression uses your browser's native encoding APIs. The quality slider gives you direct control over the size vs. quality tradeoff.
EXIF & Metadata Privacy
Photos contain hidden EXIF metadata including GPS coordinates, timestamps, and device identifiers. ZeroPNG's dedicated EXIF Remover strips all of this locally. Unlike server-based tools that could harvest your location data before "deleting" the file, your metadata never reaches any external system.
No Tracking, No Data Collection
ZeroPNG uses Google Analytics for anonymous page views only, no file contents, filenames, or image metadata are ever transmitted. We don't fingerprint browsers, don't build user profiles, and don't sell data. You can verify this in your browser's Network tab: the only outgoing requests are for static assets and analytics pings.
The Zero Philosophy
Zero Uploads
We never transmit your files across the internet for processing.
Zero Servers
Your local device's CPU handles all the complex compression securely.
Zero Cost
Because our server costs are nearly nonexistent, we give these tools to you for free.
Zero Limits
Process unlimited images with massive allowances without hitting paywalls.
Zero Mining
We never analyze, harvest, or utilize your embedded image data for any purpose.
Zero Accounts
No registration, no emails, and no passwords required to access our tools.
Who is ZeroPNG For?
Web Developers
Optimizing massive assets locally for maximum performance and superior Core Web Vitals rankings.
Photographers
Converting HEIC files and meticulously scrubbing EXIF data before sharing portfolios visually.
Everyday Users
Compressing massive smartphone photos quickly to send via chat apps without slow upload times.
Connect With Us
Explore ZeroPNG Tools
Everything you need to optimize your images, completely privately in your browser.
Image Compressor
Compress PNG, JPG, WebP, and AVIF images up to 80% smaller with TinyPNG-quality compression. Batch process, resize, and download as ZIP.
Compress Now →Image Converter
Convert images between PNG, JPG, WebP, and AVIF formats instantly. Perfect for optimizing images for web, email, or any platform.
Convert Now →HEIC to JPG Converter
Convert iPhone HEIC photos to universally compatible JPG or PNG. Open Apple photos on Windows, Android, and any browser.
Convert HEIC →Metadata & EXIF Scrubber
Instantly reveal hidden GPS, camera, and date data inside your photos. Securely scrub and strip all metadata directly in your browser with zero uploads.
Scrub Photos →Image Cropper & Resizer
Crop and resize images to exact dimensions, aspect ratios, or social media sizes. Instagram, Facebook, Twitter, YouTube presets included.
Crop Image →Image Watermark Tool
Protects your images with text or image watermarks. Adjust opacity, scale, and position. 100% private, client-side processing.
Add Watermark →Image to Base64 Converter
Convert your images into Base64 data strings for inline HTML/CSS embedding. Process entirely in your browser with zero server uploads.
Convert to Base64 →