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When building a Flutter app, the flutter tool still generates an AssetManifest.json file that is unused by the framework #143577

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#172594
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When building a Flutter app, the flutter tool still generates an AssetManifest.json file that is unused by the framework#143577
#172594
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matanlurey
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P3Issues that are less important to the Flutter projectteam-toolOwned by Flutter Tool teamtool-still-validIssues that have been deemed still valid as part of the Flutter Tools issue cleanup initiative.triaged-toolTriaged by Flutter Tool team

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@andrewkolos
andrewkolos
opened on Feb 16, 2024

Before #122505 landed, the tool would generate a file named AssetManifest.json which was bundled into the flutter app being built. This file contained information about assets. After #122505, a new file gets generated, AssetManifest.bin, which succeeded AssetManifest.json. However, the tool still produces AssetManifest.json since some customers depend on it to determine what assets are available to an app at runtime. While this was never a publicly documented feature, it was recommended as a workaround to some users. In current times, the AssetManifest provides a supported way to do this, and we want users to use that instead.

We should announce a deprecation/removal of the AssetManifest.json concept, and remove all references to it in code.

Activity

  1. andrewkolos
    added
    P2Important issues not at the top of the work list
    c: tech-debtTechnical debt, code quality, testing, etc.
    team-toolOwned by Flutter Tool team
    triaged-toolTriaged by Flutter Tool team
    on Feb 16, 2024
  2. andrewkolos
    self-assigned this
    on Feb 16, 2024
  3. sfshaza2
    added a commit that references this issue on Feb 21, 2024

    Announce deprecation of AssetManifest.json (#10165)

    bad1edd
  4. atsansone
    added a commit that references this issue on Apr 5, 2024

    Announce deprecation of AssetManifest.json (flutter#10165)

    5dd186a

  5. andrewkolos commented on Apr 25, 2024

    @andrewkolos
    andrewkolos
    on Apr 25, 2024
    ContributorAuthor

    We should announce a deprecation/removal of the AssetManifest.json concept...

    This has since been done. See the announcement for the timeline of when this issue should be fixed.

  6. andrewkolos
    added
    P3Issues that are less important to the Flutter project
    and removed
    P2Important issues not at the top of the work list
    on Jun 25, 2024

  7. andrewkolos commented on Jul 10, 2024

    @andrewkolos
    andrewkolos
    on Jul 10, 2024
    ContributorAuthor

    Unassigning since this is not actionable until at least February 15, 2025.

  8. andrewkolos
    removed their assignment
    on Jul 10, 2024
  9. matanlurey
    removed
    c: tech-debtTechnical debt, code quality, testing, etc.
    on Jul 11, 2025
  10. matanlurey
    self-assigned this
    on Jul 11, 2025
  11. matanlurey
    added
    tool-still-validIssues that have been deemed still valid as part of the Flutter Tools issue cleanup initiative.
    on Jul 11, 2025
  12. github-merge-queue
    added a commit that references this issue on Jul 25, 2025

    Remove deprecated `AssetManifest.json` file (#172594)

    0e7da1d
  13. auto-submit
    closed this as completedin #172594on Jul 25, 2025
  14. azatech
    added a commit that references this issue on Jul 28, 2025

    Remove deprecated `AssetManifest.json` file (flutter#172594)

    dbea308

  15. github-actions commented on Aug 8, 2025

    @github-actions
    github-actionsbot
    on Aug 8, 2025 – with GitHub Actions

    This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

  16. github-actions
    locked as resolved and limited conversation to collaborators on Aug 8, 2025
  17. ksokolovskyi
    added a commit that references this issue on Aug 19, 2025

    Remove deprecated `AssetManifest.json` file (flutter#172594)

    4a214aa
  18. mboetger
    added a commit that references this issue on Sep 18, 2025

    Remove deprecated `AssetManifest.json` file (flutter#172594)

    e20d161
  19. korca0220
    added a commit that references this issue on Sep 22, 2025

    Remove deprecated `AssetManifest.json` file (flutter#172594)

    677b1b9
  20. lucaantonelli
    added a commit that references this issue on Nov 21, 2025

    Remove deprecated `AssetManifest.json` file (flutter#172594)

    32a4b3f
  21. Nakiha
    added a commit that references this issue on Sep 28, 2026

    Remove deprecated `AssetManifest.json` file (#172594)

    030e3c9
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