ConvertThoseFiles logoConvertThoseFiles.com

File Conversion Methodology

Our end-to-end conversion approach, engines, quality goals, and limitations.

Last updated: June 29, 2026

Supported formats

We support widely used document, image, and archive formats including PDF, TXT, HTML, JPG, PNG, WEBP, SVG, and ZIP. Detailed coverage is documented on each tool page and in the File Format Compatibility Guide.

Conversion workflow

  1. Selection. Files are added through the browser interface and stay on your device.
  2. Validation. The file is checked for type, size, and structural integrity.
  3. Conversion. A browser-first engine performs the transformation locally, in your browser.
  4. Quality checks. The output is validated for format correctness.
  5. Delivery. The converted file is returned for download.

Conversion engines

  • Browser-first WebAssembly engines for PDF utilities, images, OCR, and ZIP — all running locally in your browser.

Quality preservation goals

We aim to preserve layout, formatting, embedded images, fonts, and (where appropriate) metadata.

Known limitations

See the Conversion Quality Expectations page for details on formatting drift, font substitution, removed macros, and unsupported features.

Update philosophy

Engines and rules are updated regularly. Material changes are reflected in this page and, where relevant, in tool-specific documentation.