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Translate any text or HTML to 195+ languages with one API call. Pick from cloud engines (Google, DeepL, Anthropic) or run on local Indic models (MADLAD-400, Sarvam, NLLB).
Create a project View engines$ curl -X POST \
https://transformone.online/api/v1/translate \
-H "Authorization: Bearer YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{
"engine": "nllb",
"source": "en", "target": "hi",
"content": "Hello, world"
}'Drop our endpoint into any service.
Translate any field with one click.
Run local Indic models on your own GPU.
Each project groups its own API keys, usage, and defaults.
Authorization: Bearer <key>. Keys are shown once; store them.
Leave the target column blank to keep the source verbatim in the output (e.g. brand names, product codes).
Add a target to force a specific translation (e.g. cardiology → हृदय रोग विज्ञान).
How translations should sound. Examples: "Use formal register. Hindi addresses the reader as आप. Prefer Devanagari for medical terms with English in parentheses on first use."
Positive rules. Examples: "Use 'हृदय' for heart. Spell out years (2026 → दो हज़ार छब्बीस). Keep numeric values unchanged."
Things to avoid. Examples: "Do not translate brand names. Do not use Urdu loanwords. Do not add commentary or explanations."
After translation, run a quality-check pass that verifies the output against your STYLE / ALWAYS / NEVER guidelines and DNT terms. Optionally auto-rewrite to fix any violations. Adds 1–6 s per request.
When enabled, source text is first rewritten by an LLM to conform to your STYLE / ALWAYS / NEVER guidelines BEFORE translation. Lets non-LLM engines (like Google) follow your brand voice. Adds ~0.5s per request.
curl -X POST https://transformone.online/api/v1/translate \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"content": "Hello, how are you?",
"engine": "opusmt",
"source": "en",
"target": "hi"
}'POST /api/v1/translate — translate text or HTML (Bearer = API key)GET /api/v1/engines — list engines + pricingGET /api/v1/projects/:id/usage — daily usage rollupCloud APIs for breadth, local models for low-cost Indic translation.
Last 100 translations across all projects.
Usage rolled up across all your projects.
More settings coming soon.
Admin-only. Create users, change roles, disable accounts.
Submissions from the marketing site contact form.
Need help? Email support@transformone.online.
Response within one business day.