Unfortunately, github.com/nlohmann/json is not REUSE compliant and does not fully adopt the recommendations to make software licensing easy for humans and machines alike. Have a look at our tutorial to learn about the three simple steps to become REUSE compliant.
To add the badge to your project's README.md
file,
use the following snippet:
[](https://api.reuse.software/info/github.com/nlohmann/json)
The API provides machine-readable artifacts for automatic analysis.
reuse spdx
command.
Commit 3ed64e502a6371311af3c2f309e6525b2f5f6f18
was checked on 07 Oct 2025 16:15:00 UTC
with the following result:
/opt/venv/lib/python3.11/site-packages/reuse/project.py:332: PendingDeprecationWarning: '.reuse/dep5' is deprecated. You are recommended to instead use REUSE.toml. Use `reuse convert-dep5` to convert. warnings.warn( /opt/venv/lib/python3.11/site-packages/reuse/project.py:332: PendingDeprecationWarning: '.reuse/dep5' is deprecated. You are recommended to instead use REUSE.toml. Use `reuse convert-dep5` to convert. warnings.warn( # MISSING LICENSES 'CC0-1.0' found in: * tests/abi/include/nlohmann/json_v3_10_5.hpp # SUMMARY * Bad licenses: 0 * Deprecated licenses: 0 * Licenses without file extension: 0 * Missing licenses: CC0-1.0 * Unused licenses: 0 * Used licenses: Apache-2.0, BSD-3-Clause, CC0-1.0, GPL-3.0-only, MIT * Read errors: 0 * Invalid SPDX License Expressions: 0 * Files with copyright information: 1166 / 1166 * Files with license information: 1166 / 1166 Unfortunately, your project is not compliant with version 3.3 of the REUSE Specification :-( # RECOMMENDATIONS * Fix missing licenses: For at least one of the license identifiers provided by the 'SPDX-License-Identifier' tags, there is no corresponding license text file in the 'LICENSES' directory. For SPDX license identifiers, you can simply run 'reuse download --all' to get any missing ones. For custom licenses (starting with 'LicenseRef-'), you need to add these files yourself.