Are JSON keys ever translated?

No. The handler only extracts and replaces string values. Keys (the left side of each colon) are never read for translation, never modified. Your key structure comes back byte-for-byte identical.

What about numbers, booleans, and null?

They pass through completely untouched. Only string values are extracted for translation. "active": true, "count": 42, "data": null — all preserved exactly.

Does the output preserve my original indentation and formatting?

Yes. The handler detects your original indentation style — 2-space, 4-space, tab-indented, or minified — and outputs with the same style. If your file was minified, the output is minified. If it used 4 spaces, the output uses 4 spaces.

Do template placeholders like {{name}} or %s get translated?

We instruct the AI to leave common placeholder patterns untouched. Only the surrounding human-readable text is translated. We recommend reviewing the output for your first file.

.json ← supported

Translate JSON Files.
Keys Always Intact.

Upload your JSON. Every string value is translated and written back exactly where it was — same keys, same nesting, same structure.

🔑 Keys never touched ⚙️ Nesting preserved 🌍 100+ languages

See Pricing — from $4.99 See How It Works

From $4.99 · 5,000 words · No subscription

🔑

Keys

never touched

⚙️

Structure

always intact

strings.en.json Ready

{

"welcome": "Welcome back!",✓

"nav": {

"home": "Home",✓

"settings": "Settings"✓

"auth": {

"login": "Sign in",✓

"logout": "Sign out"✓

}

Ready to translate 0%

⚙️ strings_FR.json Download ↓

3 Steps

Upload once. Every locale ready.

No key editing. No schema changes. No broken imports.

Upload Your .json

Drop in any JSON file. We parse the full structure — nested objects, arrays, string values — while leaving every key, number, boolean, and null exactly as-is.

.json

Pick Your Target Languages

Choose your target languages. All string values translated in parallel. Same price per word regardless of how many languages you pick.

🇪🇸 ES 🇫🇷 FR 🇩🇪 DE 🇯🇵 JA

Download — Load Into Your App

One .json per language. Same structure, same keys, same nesting.

strings_FR.json strings_DE.json

Structure Guaranteed

Only the values change. Everything else stays.

Keys, nesting, arrays, numbers, booleans, and null — all pass through untouched.

Your file

{ "hero.title": "The global platform for teams.", "hero.sub": "Ship faster, together.", "cta.primary": "Start for free" }

✓ After DocTranslate.AI (FR)

{ "hero.title": "La plateforme mondiale pour les équipes." ← key unchanged "hero.sub": "Livrez plus vite, ensemble.", "cta.primary": "Commencer gratuitement" }

🔑

Keys

Never modified, exactly as written in the original

{}

Nesting

Deep objects preserved recursively, any depth

[]

Arrays

Array order and all items preserved

🔢

Non-string values

Numbers, booleans, and null pass through untouched

🔤

Key order

Insertion order maintained throughout

📄

Encoding

UTF-8 output, BOM handled automatically

Who uses this

Built for anyone who ships JSON to production

🌐

i18n Locale Files

react-intl, i18next, vue-i18n — translate your entire en.json into every locale your app needs.

en.json → fr.json · de.json · es.json

📱

Mobile App Strings

iOS/Android string exports as JSON — all string keys preserved, ready to import back.

strings_en.json → strings_ja.json

🛒

E-commerce Product Data

Product names, descriptions, categories — bulk translate JSON exports from your catalog API.

catalog_export.json · 2,400 strings

🤖

API Response Data

Translate user-facing strings in API responses — keys, types, and structure stay valid JSON.

api_messages.json · schema intact

📧

Email Templates

Handlebars and Mustache templates in JSON — placeholders like {{name}} pass through untouched.

email_templates.json · safe

🧩

CMS Content

Contentful, Sanity, Strapi JSON exports — translate the content, preserve the schema.

contentful_export.json · schema safe

AI Engines

You pick the AI.
We preserve the keys.

Match the engine to your content type — marketing, technical, or high-volume.

Claude

Best quality

Ideal for marketing copy, creative content, and UI strings where tone matters.

GPT

ChatGPT

Fast & reliable

Great all-rounder for app strings, error messages, and product descriptions.

DeepL

European languages

Industry standard for DE, FR, ES, IT, NL locale files.

Google

Maximum coverage

100+ languages. Best for APAC and rare language pairs.

FAQ

Common questions

⚙️

Your JSON.
Every locale.
Zero config changes.

Plans from $4.99. 5,000 words. No subscription required.

See Pricing Plans See All File Formats

One-time purchase · Credits valid 1 year · No subscription

Translate JSON Files. Keys Always Intact.