Package
io-ts
TypeScript runtime type system for IO decoding/encoding
Key numbers
As of 25 Sept 2026
- Weekly downloads
- 2m
- +22% over 12 months
- Gzip bundle size
- -
- No Bundlephobia data
- Dependencies
- 0
- Direct, from package.json
- Last release
- 1 year ago
- v2.2.22
- GitHub stars
- 6.8k
- 318 forks
- Open issues / PRs
- 140 / 21
- Contributors
- -
- Commits, last 52 weeks
- 0
Downloads
Last week 2026-09-15 to 2026-09-21
2,049,283 downloads last week, 9,245,156 in the last month. The 12-month change of +22% compares the average of the last 4 weeks with the first 4 weeks of the series.
- Releases, last 12 months
- 0114 in total
- Latest version
- 2.2.22, 10 Dec 20241 year ago
- First published
- 1 Feb 2017
- Last push to GitHub
- 10 Dec 2024653 days before the snapshot
- Repository archived
- No
- Open issues
- 140
- Open pull requests
- 21
- Commits, last 52 weeks
- 0
- Dependents on npm
- 1,774
Major versions
- v2 first release 2.0.0, 2 Jul 2019
- v1 first release 1.0.0, 12 Feb 2018
- v0 first release 0.0.1, 1 Feb 2017
Recent releases
| Version | Published |
|---|---|
| 2.2.22 | 10 Dec 2024 |
| 2.2.21 | 3 Dec 2023 |
| 2.2.20 | 3 Dec 2022 |
| 2.2.19 | 6 Oct 2022 |
| 2.2.18 | 29 Aug 2022 |
| 2.2.17 | 28 Jul 2022 |
| 2.2.16 | 8 Mar 2021 |
| 2.2.15 | 22 Feb 2021 |
| 2.2.14 | 3 Feb 2021 |
| 2.2.13 | 20 Nov 2020 |
| 2.2.12 | 28 Oct 2020 |
| 2.2.11 | 5 Oct 2020 |
| 2.2.10 | 19 Aug 2020 |
| 2.2.9 | 16 Jul 2020 |
- Module format
- ESM + CommonJSFrom package.json type, main and exports fields
- TypeScript types
- Bundled
- Node.js engine range
- Not declared
- Runtimes
- -
- Unpacked size (npm)
- 449 kB
- Dependencies (0)
- None
- Peer dependencies (1)
fp-ts
npm install io-ts- jsDelivr
https://cdn.jsdelivr.net/npm/io-ts@2.2.22/ - unpkg
https://unpkg.com/io-ts@2.2.22/ - esm.sh
https://esm.sh/io-ts@2.2.22
| Package | Weekly downloads | Gzip | Last release | Module | Comparison |
|---|---|---|---|---|---|
| runtypes | 186.3k | - | 1 month ago | ESM + CommonJS | io-ts vs runtypes |
| @standard-schema/spec | 80.7m | - | 9 months ago | ESM + CommonJS | @standard-schema/spec vs io-ts |
| json-schema-to-ts | 24.9m | - | 2 years ago | ESM + CommonJS | json-schema-to-ts vs io-ts |
| @accordproject/concerto-vocabulary | 58.5k | - | 16 days ago | ESM + CommonJS | - |
| @inixiative/json-rules | 21.6k | - | 4 days ago | ESM + CommonJS | - |
| json-schema-to-typescript-lite | 629.1k | - | 1 year ago | ESM + CommonJS | - |
| @c15t/schema | 116.6k | - | 1 month ago | ESM + CommonJS | - |
| @ankhorage/contracts | 33.8k | - | 1 day ago | ESM only | - |
Related
Indexability: Indexed.