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Chrome AI Guide

Chrome Built-in AI Guide

Complete guide to setting up and using Chrome's built-in AI APIs. Different APIs have different availability levels - some are stable, others require special access.

API Availability Status

Translator API

Stable

Chrome 138+

Translate text between languages with automatic language detection

Use Cases:

  • Multilingual chat applications
  • Social media translation
  • Document translation

Language Detector API

Stable

Chrome 138+

Automatically detect the language of input text

Use Cases:

  • Auto-select source language for translation
  • Content tagging and categorization
  • Accessibility improvements

Summarizer API

Stable

Chrome 138+

Generate concise summaries from long texts

Use Cases:

  • Meeting transcripts
  • Article summaries
  • Review aggregation
  • Content previews

Prompt API

Stable

Chrome 138+

Natural language interaction with Gemini Nano

Use Cases:

  • AI chat interfaces
  • Content generation
  • Question answering

Writer API

Origin Trial

Origin Trial

Generate new content based on prompts and context

Use Cases:

  • Email composition
  • Content creation
  • Creative writing

Rewriter API

Origin Trial

Origin Trial

Rephrase and improve existing text

Use Cases:

  • Text optimization
  • Tone adjustment
  • Content refinement

Proofreader API

EPP Only

EPP Only

Interactive proofreading and grammar correction

Use Cases:

  • Document editing
  • Chat message correction
  • Blog post proofreading

Hardware Requirements

Operating System

  • Windows 10 or 11
  • macOS 13+ (Ventura or later)
  • Linux
  • ChromeOS (from platform 16389.0.0)

Storage Space

  • At least 22GB free space
  • Includes Chrome profile directory
  • Model size varies (typically 2-6GB)

GPU Requirements

  • GPU with more than 4GB VRAM
  • Required for Gemini Nano models
  • Integrated graphics may not suffice

Network

  • Unmetered internet connection
  • Required for initial model download
  • Metered connections may incur costs

Important Notes

  • • If free storage drops below 10GB, models will be automatically removed
  • • Models will be re-downloaded when requirements are met again
  • • GPU requirements are strict - integrated graphics may not work
  • • Initial model download requires significant bandwidth

Setup Instructions

Stable APIs (Chrome 138+)

Translator, Language Detector, Summarizer, Prompt APIs

Step 1: Update Chrome

Ensure you're using Chrome version 138 or later. You can check your version at chrome://version

Stable Chrome release is sufficient

Step 2: Enable Required Flags

Open Chrome and navigate to chrome://flags, then enable these flags:

#optimization-guide-on-device-model
#translation-api
#language-detection-api
#summarization-api-for-gemini-nano
#prompt-api-for-gemini-nano

Step 3: Restart Chrome

Click the "Relaunch" button at the bottom of the flags page to restart Chrome with the new settings.

Origin Trial APIs

Writer and Rewriter APIs

Step 1: Join Origin Trial

Register for the Chrome Origin Trials to access experimental APIs:

  • • Visit Chrome Origin Trials
  • • Search for "Writer API" and "Rewriter API"
  • • Register your domain and get the trial token

Step 2: Add Trial Token

Add the origin trial token to your website's HTTP headers:

Origin-Trial: YOUR_TRIAL_TOKEN_HERE

Step 3: Enable Flags

Enable these additional flags in chrome://flags:

#writer-api-for-gemini-nano
#rewriter-api-for-gemini-nano

Early Preview Program (EPP)

Proofreader API

Step 1: Join EPP

Apply to join Chrome's Early Preview Program:

  • • Visit the Chrome Release Channels page
  • • Find the Early Preview Program section
  • • Submit your application with use case details

Step 2: Use Chrome Canary

Download and use Chrome Canary for EPP features:

Download Chrome Canary

EPP Requirements

  • • Approval required from Chrome team
  • • Must demonstrate legitimate use case
  • • Limited to approved participants only
  • • Features may be unstable or change frequently

Verification

Test Each API

Visit each page in the playground to verify the APIs are working:

Translate

Summarize

Prompt

Writer

Troubleshooting

  • • If APIs show "Not Available", check that all flags are enabled
  • • Ensure Chrome is updated to the latest version
  • • Check hardware requirements are met
  • • Verify you have sufficient storage space
  • • Try restarting Chrome after enabling flags

Important Notes

  • • Chrome AI features are experimental and may change
  • • APIs may become unavailable in future Chrome versions
  • • Keep Chrome updated to access the latest features
  • • Origin Trial tokens expire and need renewal
  • • EPP access is limited and requires approval