What FormatFixer is
FormatFixer is a single-domain portfolio of file converters — HEIC to JPG, MP4 to MP3, GPX to KML, VCF to CSV, and dozens more. Every converter lives at its own URL, does one job, and does it without asking for your email, your credit card, or a login.
The site covers image, video, audio, subtitle, GPS, contacts, and calendar formats today, with ebook, font, 3D, and PDF families on the roadmap. Each converter is a static HTML page with a tiny JavaScript engine attached — drop a file, get a download, close the tab.
Why it exists
Most online converters upload your files to a server, run a tool there, and send the result back. That works, but it means your iPhone photos, client contact list, training routes, or scanned documents all pass through a stranger's machine — often logged, cached, or retained for longer than you'd expect.
For a lot of everyday conversions, that tradeoff is unnecessary. Modern browsers can decode HEIC, transcode MP4 via WebAssembly, parse vCard and iCalendar, and read/write XML — without any server in the loop. FormatFixer is built on the idea that if the browser can do it, the server shouldn't be involved at all.
How it works
Each converter page loads a small JavaScript module that handles its specific format — ffmpeg.wasm for audio and video, heic2any for HEIC decoding, hand-rolled parsers for subtitles, GPS traces, and contact files. When you drop a file in, the browser reads it, the module transforms it in memory, and the result is offered as a download.
No file bytes ever touch a FormatFixer server, because there is no FormatFixer server beyond the static hosting that delivers the HTML and JavaScript. You can verify this yourself: open your browser's Network tab, drop a file, and watch — no outbound upload request happens. Airplane mode works too, once the page has loaded.
Who built it
FormatFixer is built and maintained by a small independent team. The site has no investors, no paid team, and no product roadmap driven by anyone but its users. It is funded by unobtrusive display ads (see our Privacy page for details) so the tools can stay free for everyone.
Questions, bug reports, or format requests are always welcome — email us at hello@formatfixer.app.