Small and Fast TOML Parser

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library 1.6.1 ·javascript
verified May 27, 2026

smol-toml is a JavaScript and TypeScript library designed for parsing and serializing TOML (Tom's Obvious, Minimal Language) documents. Currently at version 1.6.1, it offers a small, fast, and highly compliant implementation of the TOML specification, supporting the latest TOML 1.1.0 standard since version 1.6.0. It maintains a regular release cadence with recent updates addressing security vulnerabilities and feature enhancements. Differentiating itself from other often outdated or unmaintained TOML parsers in the JavaScript ecosystem, smol-toml is noted as the most downloaded TOML parser on npm, actively used in production systems. While generally robust, it explicitly notes some non-compliance with the `toml-test` suite for performance reasons, such as not rejecting invalid UTF-8 or certain invalid dates. It also provides options for handling integers as BigInts to prevent precision loss, a feature introduced in v1.4.0.

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