File conversion and privacy blog
Articles on file formats, private file sharing and how we convert files in your browser.
Engineering · 3 min read
How we run image codecs in your browser
How Convertur converts HEIC and other photos inside your browser tab with WebAssembly, so the file never leaves your device.
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Privacy · 3 min
The real cost of free online convertersWhere your file goes when you upload it to a free online converter, what the terms often allow, and what to check before you upload.
Formats · 3 min
HEIC explained in two minutesWhy iPhone HEIC photos won't open in some Windows apps and websites, what a HEIC file holds, and which format to convert to.
Formats · 4 min
WebP vs PNG: when to use each formatWebP vs PNG compared: file size, quality, transparency and compatibility. Use WebP for faster web pages and PNG for editing and sharing.
Engineering · 3 min
Shipping WASM codecs without the bloatHow code splitting, smaller builds, caching and Web Workers keep large WebAssembly codecs from slowing down the first page load.
Guides · 3 min
Compress images without visible lossHow to compress images without visible quality loss: how lossy compression works, why to resize first, and how to find the right quality setting.
Formats · 3 min
Why your camera shoots HEIC by defaultWhy iPhones switched from JPG to HEIC, what the format holds besides a smaller photo, and where HEIC still fails to open.