https://github.com/MaJerle/lwjson

Lightweight JSON parser for embedded systems
https://github.com/MaJerle/lwjson

embedded javascript javascript-object-notation json lightweight microcontroller optimization parser reader stream streaming systems

Last synced: 11 days ago
JSON representation

Lightweight JSON parser for embedded systems

• Host: GitHub
• URL: https://github.com/MaJerle/lwjson
• Owner: MaJerle
• License: mit
• Created: 2020-11-30T22:14:06.000Z (over 5 years ago)
• Default Branch: develop
• Last Pushed: 2025-11-28T15:35:52.000Z (3 months ago)
• Last Synced: 2025-11-30T21:21:28.596Z (3 months ago)
• Topics: embedded, javascript, javascript-object-notation, json, lightweight, microcontroller, optimization, parser, reader, stream, streaming, systems
• Language: C
• Homepage:
• Size: 415 KB
• Stars: 243
• Watchers: 12
• Forks: 58
• Open Issues: 7
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE
  • Authors: AUTHORS

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• awesome-mcu-embedded - Lightweight JSON text parser

README

          
# Lightweight JSON text parser

Library provides generic JSON text parser, that is optimized for embedded systems.

Supports `streaming` parsing or classic parsing with full JSON data available in one big linear memory.

First one being optimized for ultra small microcontrollers, second one being ready for PC applications - or simply when several kB of RAM memory is available at any given point of time

Read first: Documentation



## Features

* Written in C (C11), compatible with ``size_t`` for size data types

* RFC 4627 and RFC 8259 compliant

* Based on static token allocation with optional application dynamic pre-allocation

* No recursion during parse operation

* Re-entrant functions

* Zero-copy, no ``malloc`` or ``free`` functions used

* Supports streaming parsing as secondary option

* Optional support for inline comments with `/* comment... */` syntax between any *blank* region of input string

* JSON serializer separate module

* Advanced find algorithm for tokens

* Test coverage is available

* User friendly MIT license

## Contribute

Fresh contributions are always welcome. Simple instructions to proceed:

1. Fork Github repository

2. Follow [C style & coding rules](https://github.com/MaJerle/c-code-style) already used in the project

3. Create a pull request to develop branch with new features or bug fixes

Alternatively you may:

1. Report a bug

2. Ask for a feature request