Drop in a file and get it back in the format you need — CSV to XLSX, XLSX to CSV, DOCX to PDF, HEIC to JPG, PNG to WebP, and more. Every conversion runs on your own machine using WebAssembly, so your spreadsheets and photos never leave the browser or touch a server. Drag in a whole batch and convert them in one pass; because there's no upload step, even large files finish as fast as your CPU allows. Works offline once the page has loaded.
No. The converter runs completely inside your browser using WebAssembly. Your files are read and rewritten locally, and nothing is ever sent to a server — you can even disconnect from the internet and it still works.
Yes. Drop in HEIC files and convert them to JPG right in the browser. You can also convert between PNG, JPG, WebP, and SVG the same way.
You can convert large files, though XLSX caps out at 1,048,576 rows. If a CSV exceeds that, the tool warns you before converting instead of crashing halfway through.
Every tool runs entirely in your browser. Files are never uploaded — 100% private and free.