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Open Source Licenses

Updated: 29 August 2026

Thank you

Keepdesk is built on the open-source software listed below. The MIT License requires that copyright notices be included with copies of the software; this page is that notice.

hwp-convert — MIT License

https://github.com/shyang1012/hwp-convert

Copyright (c) 2026 shyang (hwp-convert)
Copyright (c) 2025 ssabro (hwpxjs — the original work this project was forked from)
Copyright (c) 2025-2026 Edward Kim (rhwp — HWP 5.0 binary parser structure)
Permission is hereby granted, free of charge, to any person obtaining a copy of this
software and associated documentation files (the "Software"), to deal in the Software
without restriction, including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

fflate — MIT License

https://github.com/101arrowz/fflate

Copyright (c) 2026 Arjun Barrett
Permission is hereby granted, free of charge, to any person obtaining a copy of this
software and associated documentation files (the "Software"), to deal in the Software
without restriction, including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

@rhwp/core — MIT License

https://github.com/edwardkim/rhwp

Copyright (c) 2025-2026 Edward Kim
The Rust + WebAssembly engine that draws the original page layout.
Permission is hereby granted, free of charge, to any person obtaining a copy of this
software and associated documentation files (the "Software"), to deal in the Software
without restriction, including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

pdf.js (pdfjs-dist) — Apache License 2.0

https://github.com/mozilla/pdf.js

Copyright 2012 Mozilla Foundation
The engine that parses and renders PDF pages (PDF → image).
Used under the Apache License, Version 2.0, which requires this copyright notice and a copy of the license.
Full text: https://www.apache.org/licenses/LICENSE-2.0 — the software is provided "AS IS", without warranties of any kind.

pdf-lib — MIT License

https://github.com/Hopding/pdf-lib

Copyright (c) 2019 Andrew Dillon
Used to merge and split PDFs.
Permission is hereby granted, free of charge, to any person obtaining a copy of this
software and associated documentation files (the "Software"), to deal in the Software
without restriction, including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

qrcode-generator — MIT License

https://github.com/kazuhikoarase/qrcode-generator

Copyright (c) 2009 Kazuhiko Arase
Used to generate QR codes. QR Code is a registered trademark of DENSO WAVE INCORPORATED.
Permission is hereby granted, free of charge, to any person obtaining a copy of this
software and associated documentation files (the "Software"), to deal in the Software
without restriction, including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

Inter (font) — SIL Open Font License 1.1

https://github.com/rsms/inter

Copyright 2016 The Inter Project Authors
Used for the logo wordmark and brand name. Full text: https://openfontlicense.org
This font is used under the SIL Open Font License 1.1. It may be used freely provided the font itself is not sold and this notice is retained.

Manrope (font) — SIL Open Font License 1.1

https://github.com/googlefonts/manrope

Copyright 2018 The Manrope Project Authors
Used for numerals in body text (subset: digits, %, ×, ÷). Full text: https://openfontlicense.org
This font is used under the SIL Open Font License 1.1. It may be used freely provided the font itself is not sold and this notice is retained.

File format specifications

HWPX is published as Korean national standard KS X 6101 (OWPML). The HWP binary format is handled by an open-source implementation built from the format owner's publicly released specification.

ToolsHWP ViewerPDF → ImageImages → PDFMerge PDFSplit PDFCompress PDFOrganize PDF PagesImage Format ConverterCompress ImagesCrop & Resize ImageID Photo ResizerFavicon GeneratorImage WatermarkRedact & Blur ImageRemove Photo EXIF & GPSCharacter CounterText CleanerText Compare (Diff)JSON Formatter & ValidatorColor Code ConverterCSS clamp() CalculatorDate CalculatorAge CalculatorGPA ConverterUnit ConverterPercentage CalculatorVAT / Sales Tax CalculatorPrint Size CalculatorCBM CalculatorQR Code GeneratorBarcode GeneratorPassword GeneratorAll tools →Blog

“Hangul”, “Hancom”, “HWP” and “HWPX” are registered trademarks of Hancom Inc. Keepdesk is an independent project with no affiliation, sponsorship or endorsement by Hancom Inc., and uses those marks solely to identify the document formats it reads. Converted output can differ from the original, so check it against the source before relying on it for anything official.

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