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Convert Files in Your Browser

100% private. No uploads. All processing happens locally on your device.

Drop any file to get started

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Why choose DuckConvert?

DuckConvert is a revolutionary web-based file conversion tool that processes all files directly within your browser. By utilizing modern WebAssembly (WASM) and local browser APIs, we bring desktop-level processing power straight to your web browser without requiring any software installation or cloud uploads.

100% Private

Your files are never uploaded to our servers. Because the conversion happens entirely on your device, your sensitive data, personal photos, and confidential documents remain completely private and secure.

Lightning Fast

Skip the upload and download wait times. DuckConvert uses your device's own hardware to perform conversions instantly, making it much faster than traditional cloud-based converters, especially for large files.

Works Offline

Once the site is loaded, DuckConvert functions as a Progressive Web App (PWA). You can continue converting files even if you lose your internet connection, making it an indispensable tool for traveling.

Comprehensive Format Support

Whether you need to convert high-efficiency images (HEIC to JPG), web-optimized formats (WebP to PNG), heavy video files (MKV to MP4), or raw data (CSV to JSON), we provide a unified, powerful interface for all your conversion needs.

Image Converter

Convert HEIC, AVIF, WebP, PNG, JPG, and SVG. Compress images or convert to PDF.

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Video & Audio

Convert MP4, MKV, MOV, WebM. Extract audio to MP3, WAV.

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PDF Tools

Convert PDFs to images, images to PDF, or merge multiple PDFs into one document.

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Geodata Tools

Convert spatial data files like KML and GPX into standard GeoJSON format.

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Data & Docs

Convert CSV, JSON, YAML, XML, and Markdown. Extract ZIP archives.

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Supported Formats

Browse our complete directory of all supported file formats and extensions.

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Frequently Asked Questions

Unlike traditional converters, DuckConvert never uploads your files to a server. All file processing happens locally within your web browser using WebAssembly technology. Your sensitive data never leaves your device.
Yes, DuckConvert is 100% free to use. There are no subscriptions, no hidden fees, and no file size limits for most conversions, as it uses your own device's resources.
No installation is required. DuckConvert works directly in any modern web browser (Chrome, Firefox, Safari, Edge) on desktop, tablet, or mobile.
Yes! DuckConvert is a Progressive Web App (PWA). Once you've visited the site, the core conversion tools are cached in your browser and will continue to function even when you're offline.
We support hundreds of combinations, including popular formats like HEIC to JPG, WebP to PNG, MP4 to MP3, PDF to Image, and data formats like CSV to JSON.