Built for speed, privacy, and zero friction.
Every conversion on FreeFileConverter.org runs entirely inside your browser using standard web APIs — the HTML5 Canvas API for images, the File API for reading files, and JavaScript for data transformations. No files are sent to any server at any point.
This is possible because modern browsers are genuinely powerful. A Canvas element can decode an image, recompose it at any quality level, and export it in a new format — all without a single network request after the page loads.
Most online file converters upload your files to a cloud server, process them there, and serve the result back. That creates real privacy risks — particularly for sensitive documents, design files, or proprietary CAD drawings. We wanted a converter that was genuinely zero-upload, not just one that claims to be.
We also wanted no artificial limits. No "3 free conversions per day." No mandatory account. No watermarks. The tool is free and unlimited because the processing cost is zero — your machine does all the work.
Images: PNG, JPG, WebP, BMP, GIF, ICO — convert between any combination using Canvas API at your chosen quality level.
Data files: CSV, JSON, TSV, XML — tabular data converts cleanly between all formats. First-row headers are preserved as JSON keys.
Documents: TXT, Markdown, HTML — convert between plain text and markup formats with full syntax support.
CAD / Vector: DXF to SVG conversion for lines, arcs, circles, and polylines. Ideal for laser cutting and web display workflows.
Power users can add their own API key (currently Cloudinary) to unlock heavier conversions — PDF processing, Office formats (DOCX, XLSX), audio, and video. Your key is stored only in your browser's local storage and is never transmitted to our servers.
Found a bug or have a format request? Open an issue on GitHub — it's the fastest way to get a response.