About Converter.Plus
Why We Built This
Converter.Plus was born out of frustration. Every time you try to open an iPhone photo on a Windows computer, or hand a PDF to a tool that wants a different format, you hit a wall. You search for a converter, and the top results are bloated desktop apps that cost money, or sketchy web services that demand you upload your personal files to a remote server with an unclear privacy policy and unknown data retention practices.
We asked a simple question: why does converting a file require a server at all? Modern browsers are extraordinarily capable. They can decode and encode documents and images using WebAssembly — the same technology that powers high-performance web apps and games. There is no technical reason your private vacation photos, medical scans, legal documents, or personal screenshots need to travel across the internet just to change their file format.
So we built Converter.Plus as a browser-first tool where every byte of processing happens locally, on your own device, with zero network requests carrying your file data. The result is a file converter that is simultaneously faster, more private, and more accessible than server-based alternatives.
How It Works
When you drop an image into Converter.Plus, the file is read directly by your browser using the File API. Depending on the format, we use one of several decoding strategies: native browser Canvas APIs for widely-supported formats, and compiled WebAssembly modules for formats like HEIC and JXL that require more specialized codecs. The decoded image data is then re-encoded to your chosen output format — again entirely within the browser's sandbox. The resulting file is presented to you as a download. At no point is any image data sent over the network.
Our Values
Privacy first
Your files never leave your device. We can't see them, and neither can anyone else.
Speed matters
No upload wait time. Conversion starts the moment you drop your file.
Always free
No paywalls, no file limits, no watermarks. Supported by non-intrusive advertising.
Works everywhere
Mac, Windows, iPhone, Android — any device with a modern browser.
What We Support
Converter.Plus supports a growing range of file formats and use cases — from documents and images to web optimization and developer utilities:
- HEIC / HEIF to JPG or PNG — Convert iPhone and iPad photos to universally compatible formats.
- AVIF to JPG or PNG — Open next-generation web images in any software.
- WebP to JPG or PNG — Convert images saved from websites to standard formats.
- JXL to JPG — Decode the next-generation JPEG XL format (experimental).
- JPG / PNG to WebP or AVIF — Optimize images for modern web delivery.
- Image Optimizer — Compress JPG, PNG, and WebP files without visible quality loss.
- Screenshot Optimizer — Paste and compress screenshots for docs and support tickets.
- EXIF Metadata Cleaner — Strip GPS, timestamps, and device info before sharing photos.
- Image Format Analyzer — Identify any image's format and estimate potential savings.
- Image to Base64 — Convert images to data URLs and CSS snippets for developers.
Get in Touch
Have feedback, a feature request, or a question? We'd love to hear from you. Visit our contact page or email us directly at mobaric@gmail.com.