Copyright and Intellectual Property Policy

Copyright and Intellectual Property Policy

Last updated: 2026-09-28

1. Website Content and Code

The design, source code, text, and original graphics of 4Dev.net are the property of 4Dev.net or its licensors, except where a specific component is explicitly identified as open-source (see below). All rights not expressly granted are reserved.

2. Open-Source Components and Credits

4Dev.net is built on the work of open-source developers and open-data projects, and we are grateful to every one of them. Each component is governed by its own license; using 4Dev.net does not grant you rights to them beyond what those licenses provide. The full list:

In your browser, served from 4Dev.net

• Mediabunny 1.60.0 - video and audio conversion. by Vanilagy. License: MPL-2.0.
• @mediabunny/mp3-encoder 1.60.0 - MP3 encoding. by Vanilagy. License: MPL-2.0.
• PDF.js (pdfjs-dist) 5.7.284 - reading PDF files. by Mozilla Foundation. License: Apache-2.0.
• gifenc 1.0.3 - video and audio conversion. by Matt DesLauriers. License: MIT.
• LAME - MP3 encoding. License: LGPL-2.0-or-later.
• libheif + libde265 1.19.8 - opening HEIC photos. by struktur AG; WebAssembly build by libheif-js (Kiril Vatev). License: LGPL-3.0.
• libwebp encoder (jSquash) 1.5.0 - saving WebP images where the browser can't. by Google; WebAssembly build by jSquash (Jamie Sinclair), based on Squoosh. License: BSD-3-Clause / Apache-2.0.
• jsdiff 9.0.0 - comparing texts. by Kevin Decker. License: BSD-3-Clause.
• Inter - the site typeface. by Rasmus Andersson. License: OFL-1.1.

In your browser, loaded from a public CDN

• SheetJS Community Edition (xlsx) 0.20.2 - reading and writing spreadsheets. by SheetJS LLC. License: Apache-2.0.
• Mammoth.js 1.6.0 - reading Word documents. by Michael Williamson. License: BSD-2-Clause.
• FileSaver.js 2.0.5 - saving files. by Eli Grey. License: MIT.
• fast-xml-parser 5.11.1 - XML parsing. by Amit Gupta. License: MIT.
• Tesseract.js 5.1.1 - reading the card number from a photo. by Jerome Wu, Balearica and contributors. License: Apache-2.0.
• Tesseract trained data (eng, tessdata_best) 4.0.0 - reading the card number from a photo. by Google; packaged by Tesseract.js. License: Apache-2.0.
• sql-formatter 15.4.2 - SQL formatting. by sql-formatter-org. License: MIT.

On our server

• docx - creating Word documents. by Dolan Miu. License: MIT.
• @noble/hashes 1.8.0 - hash algorithms (SHA-3, BLAKE2, RIPEMD-160). by Paul Miller. License: MIT.
• PDFKit - creating PDF files. by Devon Govett. License: MIT.
• pdf-lib 1.17.1 - creating PDF files. by Andrew D. Kelley. License: MIT.
• Papa Parse - CSV parsing. by Matthew Holt. License: MIT.
• js-yaml - YAML parsing. by Vitaly Puzrin. License: MIT.
• @iarna/toml - TOML parsing. by Rebecca Turner. License: ISC.
• marked - Markdown to HTML. by Christopher Jeffrey. License: MIT.
• Turndown + turndown-plugin-gfm - HTML to Markdown. by Dom Christie. License: MIT.
• jsdiff - comparing texts. by Kevin Decker. License: BSD-3-Clause.
• node-qrcode - QR codes. by Ryan Day. License: MIT.
• parse5 - building and checking the pages. by Ivan Nikulin. License: MIT.
• PostCSS, clean-css - building and checking the pages. by Andrey Sitnik; Jakub Pawlowicz. License: MIT.
• Express, Helmet, cors, express-rate-limit, dotenv - the web server and its security headers. License: MIT / BSD-2-Clause.

Data and images

• Frankfurter - exchange rates for major currencies. by Hakan Ensari. License: MIT.
• European Central Bank - official euro reference rates. License: reference rates, reused with attribution.
• exchange-api (currency-api) - rates for other currencies and cryptocurrencies. by Fawaz Ahmed. License: CC0-1.0.
• Flagpedia (flagcdn.com) - flag images. by Flagpedia.net. License: free to use.
• CoinCap - cryptocurrency icons. License: icons are trademarks of their owners.

License notices and the full license texts of the components 4Dev.net serves itself: third-party-licenses.txt · MPL-2.0 · LGPL-2.0 · OFL-1.1

QR Code is a registered trademark of DENSO WAVE INCORPORATED.

3. Your Input and Output

4Dev.net claims no ownership over content you submit to a tool for processing, or over the output a tool generates for you. That said, since input data is not stored (see the Privacy Policy), you are responsible for keeping your own copy of anything you process here.

4. Third-Party Trademarks

Cryptocurrency names (such as Bitcoin, Ethereum), currency names, and any other third-party names, logos, or trademarks referenced on the Website belong to their respective owners. Their use on 4Dev.net is descriptive/nominative (to identify what a tool converts or looks up) and does not imply any affiliation, sponsorship, or endorsement by those trademark owners.

5. Reporting an Infringement Concern

If you believe content on 4Dev.net infringes your intellectual property rights, contact us via the Contact and Error Reporting page with enough detail to identify the material and your rights in it, and we will look into it.