---
title: "Submit translation diffs"
method: POST
path: "/v2/project/files/diffs"
tags: ["Files"]
---

# Submit translation diffs

`POST /v2/project/files/diffs`

Overwrite translations with user-provided localized content.

## Headers

- `gt-api-version` '2025-01-01.v0' | '2025-11-03.v1' | '2026-02-18.v1' | '2026-03-06.v1' — API contract version. Defaults to the oldest supported version.
- `gt-project-id` string — Target project ID. Required when authenticating with an organization API key; ignored with project-scoped API keys (the project is resolved from the key).

## Request body

- object
  - `projectId` string
  - `diffs` object[], required
    - `locale` string, required
    - `diff` string, required
    - `branchId` string
    - `versionId` string, required
    - `fileId` string, required
    - `localContent` string, required

## Response `200`

Processed user translation edits

- object
  - `filesProcessed` integer, required
  - `entriesReceived` integer, required
  - `message` string, required

## Other responses

- `400` — Request error
- `401` — Request error
- `403` — Request error
- `413` — Request error
- `429` — Request error
- `500` — Request error

## Changes

- **2026-08-27** `367cd605d090` — 4 breaking, 15 info
  - the `diffs/items/branchId` request property's minLength was increased from `0` to `1`
  - the `diffs/items/fileId` request property's minLength was increased from `0` to `1`
  - the `diffs/items/locale` request property's minLength was increased from `0` to `1`
  - the `diffs/items/versionId` request property's minLength was increased from `0` to `1`
  - …15 more

[Change history](https://skmtc.dev/generaltranslation/apis/general-translation-api/changes/v2/project/files/diffs/post.md)

---

[API](https://skmtc.dev/generaltranslation/apis/general-translation-api.md) · [All operations](https://skmtc.dev/generaltranslation/apis/general-translation-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/generaltranslation/general-translation-api/revisions/5f954204ea21/schema)