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wat

Rust parser for the WebAssembly Text format, WAT

1.257.1 37M downloads/mo #1488 most downloaded on crates.io bytecodealliance/wasm-tools

What this package is like to depend on

Last release 4 days ago

19 Aug 2026

Ships fairly regularly

a new release about every 2 weeks

Rarely documented

notes for 10 of 166 stable releases

2 versions withdrawn

withdrawn after publishing

10 years old

168 releases · first in 2016

24 releases in the last 12 months

see the full history below

Release timeline

168 releases · Sep 2016 to Aug 2026
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026
Release Pre-release Withdrawn

Releases

latest 60 of 168
  1. 1.257.1 19 Aug 2026
    Release notes

    What's Changed

    • Restore the default for component new --merge-imports-based-on-semver by @Lstarsky0 in #2611
    • Release wasm-tools 1.257.1 by @github-actions[bot] in #2612

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    Full Changelog: v1.257.0...v1.257.1

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  2. 1.257.0 19 Aug 2026
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    Full Changelog: v1.256.0...v1.257.0

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  3. 1.256.0 10 Aug 2026
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  4. 1.255.0 30 Jul 2026
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    What's Changed

    • Fix generating deeply nested WIT types in wit-smith by @alexcrichton in #2576
    • wasm-tools mutate: validate the input module before mutating by @SAY-5 in #2577
    • link tag imports to exports instead of synthesizing tags by @dicej in #2580
    • Fix folded branch hints by @vouillon in #2578
    • support cooperative multithreading ABI in wit_component::linking by @dicej in #2581
    • avoid calling __wasm_init_task more than once in init module by @dicej in #2582
    • Support __wasm_{g,s}et_{tls_base,stack_pointer} in wit-component by @alexcrichton in #2584
    • fix table resolution for thread.new-indirect intrinsic calls by @dicej in #2585
    • Release wasm-tools 1.255.0 by @github-actions[bot] in #2586

    Full Changelog: v1.254.0...v1.255.0

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  5. 1.254.0 20 Jul 2026
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  6. 1.253.0 07 Jul 2026
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  7. 1.252.0 12 Jun 2026
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    What's Changed

    • Converge to unicode-ident and remove unicode-xid dependency by @Marcondiro in #2535
    • wasm-smith: Allow limiting the size of const arrays by @alexcrichton in #2536
    • fix(wit-encoder): only use serde attribute if serde is enabled by @MendyBerger in #2538
    • Enable the CM_ASYNC feature by default by @alexcrichton in #2539
    • fix(wit-parser)!: preserve docs on world interface imports/exports by @ricochet in #2540
    • Release wasm-tools 1.252.0 by @github-actions[bot] in #2541

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    Full Changelog: v1.251.0...v1.252.0

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  8. 1.251.0 28 May 2026
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    What's Changed

    • wit-parser: don't panic on a re-exported imported resource by @eyupcanakman in #2526
    • Support components with custom page sizes by @anlavandier in #2524
    • Fix grammar typo in wit-dylib README.md by @brettcannon in #2527
    • wasm-wave: catch error in UntypedFuncCall::to_wasm_params by @pchickey in #2528
    • wit-parser: add ItemName type and parser by @pchickey in #2529
    • wasm-wave: parse wit ItemNames as UntypedFuncCall names by @pchickey in #2530
    • wit-parser: rust docs for ItemName, and instance_name method doing the obvious by @pchickey in #2533
    • Release wasm-tools 1.251.0 by @github-actions[bot] in #2534

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    Full Changelog: v1.250.0...v1.251.0

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  9. 1.250.0 21 May 2026
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    Full Changelog: v1.249.0...v1.250.0

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  10. 1.249.0 15 May 2026
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    Full Changelog: v1.248.0...v1.249.0

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  11. 1.248.0 28 Apr 2026

    Nothing published for this version

  12. 1.247.0 17 Apr 2026

    Nothing published for this version

  13. 1.246.2 03 Apr 2026

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  14. 1.246.1 31 Mar 2026

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  15. 1.246.0 31 Mar 2026

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  16. 1.245.1 12 Feb 2026

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  17. 1.245.0 10 Feb 2026

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  18. 1.244.0 06 Jan 2026

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  19. 1.243.0 03 Dec 2025

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  20. 1.242.0 26 Nov 2025

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  21. 1.241.2 14 Nov 2025

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  22. 1.240.0 08 Oct 2025

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  23. 1.239.0 09 Sep 2025

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  24. 1.238.1 02 Sep 2025

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  25. 1.238.0 26 Aug 2025

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  26. 1.237.0 21 Aug 2025

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  27. 1.236.1 14 Aug 2025

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  28. 1.236.0 28 Jul 2025

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  29. 1.235.0 13 Jun 2025

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  30. 1.234.0 10 Jun 2025

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  31. 1.233.0 03 Jun 2025

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  32. 1.232.0 27 May 2025

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  33. 1.231.0 23 May 2025

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  34. 1.230.0 05 May 2025

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  35. 1.229.0 17 Apr 2025

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  36. 1.228.0 01 Apr 2025

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  37. 1.227.1 07 Mar 2025

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  38. 1.227.0 05 Mar 2025

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  39. 1.226.0 19 Feb 2025

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  40. 1.225.0 04 Feb 2025

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  41. 1.224.1 05 Feb 2025

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  42. 1.224.0 22 Jan 2025

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  43. 1.223.1 05 Feb 2025

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  44. 1.223.0 08 Jan 2025

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  45. 1.222.1 05 Feb 2025

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  46. 1.222.0 18 Dec 2024

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  47. 1.221.3 05 Feb 2025

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  48. 1.221.2 02 Dec 2024

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  49. 1.221.1 02 Dec 2024

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  50. 1.221.0 27 Nov 2024

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  51. 1.220.1 05 Feb 2025

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  52. 1.220.0 12 Nov 2024

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  53. 1.219.2 05 Feb 2025

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  54. 1.219.1 10 Oct 2024

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  55. 1.219.0 08 Oct 2024

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  56. 1.218.1 05 Feb 2025

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  57. 1.218.0 30 Sep 2024

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  58. 1.217.1 05 Feb 2025

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  59. 1.217.0 10 Sep 2024

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  60. 1.216.1 05 Feb 2025

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