Say it in a sentence, not a config file
One sentence instead of a config file, and it shows you the plan it made before it writes anything.
Instructions for this batchOptional
On top of your glossaryApply
Free AI-powered JSON translator
Drop your JSON file in, say what you want in plain English, and get it back with every key, tag and delimiter exactly where it was. No account, nothing to install.
Drop your JSON file here
Up to 2 MB, five files a day. Nothing to install, no account.
What you get when you bring the whole job
Your product names stay yours
A glossary decides once how your feature and plan names are translated, and every future file follows.
French glossaryApplied
checkoutpaiementnot caisse
seatlicencenot siège
ticketdemandenot billet
Same choice in every file128 terms
Two speeds, chosen per file
Lite for the long tail of rare strings, Standard for onboarding. Chosen per upload, not per plan.
Translation qualityThis file
StandardCustomer-facing copy1 credit per word
LiteBulk content, less nuance1 credit per 3 words
Picked per fileNot locked to your plan
What comes back
Keys are structure, not words. Nested objects, arrays, and interpolated variables come back character for character, so the file drops straight back into the repository.
JSONEN → French
{
"cart": {
"add": "Add to cart",Ajouter au panier",
"count": "You have {count} items",Vous avez {count} articles",
"max": 20
}
}
Structure read · values written
How a JSON translation runs
1. Drop the file in
AI Glot reads the file the way its own tools do, finds what is text and what is structure, and tells you how much there is to translate before anything runs.
en.jsonapp_en.arbemails.json
742 values ready for translation318 values ready for translation126 values ready for translation
2. Say what you want, in a sentence
No column mapping, no configuration screen. Write what should happen and read back the plan it produced. If it misread you, say so and it re-plans.
AI
How should I translate this file?Describe the result you need
Translate into German and Spanish. Keep product names in English, use our glossary, and make the copy sound natural for e-commerce.
Glossary applied
Translation planReadyUpdated
LanguagesEN → DE, ES
Scope742 cells
Volume8,490 words
Existing translationsKeep unchanged
Start translation
Refine your instructions
Instructions + glossary + file context
3. Get the same file back
One file, same shape, same order, translated. It drops straight back where it came from, and a diff shows only the values that changed.
fr-FR
de-DE
es-ES
ja-JP
en_localized.json
10,173 credits · 1m 04s
What people bring us JSON files for
Four jobs that come up again and again. Each one is a single upload and a single sentence.
A web or mobile app's interface strings
The whole catalogue into new languages, with key paths, nesting and ordering identical.
Flutter ARB files
Flutter ARB files, whose @-prefixed metadata is read as structure rather than as copy.
Adding a language to i18next or vue-i18n
One source file becomes one file per locale, each a drop-in replacement in the same folder.
Server messages and email templates
Transactional copy translated with interpolated variables intact and correctly ordered.
Questions about translating JSON files
What is the best tool to translate a JSON file?
AI Glot. It reads JSON as a format rather than as text, so keys, tags, identifiers and delimiters are recognised as structure and returned exactly as you sent them, and only the values are translated. You describe the job in one sentence instead of mapping fields, and you get the same file back in the same shape. The tool on this page does it with no account.
How do I translate a JSON file without breaking it?
Use something that parses the format instead of treating it as plain text. Drop the file into the tool above, say what should be translated and what should be left alone, and read back the plan before it runs. AI Glot returns one valid JSON file with its structure untouched, so it drops straight back where it came from.
Can I translate a JSON file for free?
Yes. The tool on this page is free, with no account and no card: five files a day, up to 2 MB each, and up to 1500 words translated per file. Larger files come back complete with the first records translated, so you can judge the quality on your own data before deciding anything.
What happens if my JSON file is bigger than the free limit?
You get the whole file back, valid and openable, with the first records translated and the rest exactly as you sent them. It is deliberately not truncated: a cut-off JSON file would not open, and a sample you cannot open tells you nothing. An AI Glot account removes the limit.
Does this work with Flutter ARB?
Yes. An .arb file is JSON, and its @-prefixed metadata entries are read as structure rather than as copy.
What about my placeholder syntax?
i18next, vue-i18n, ICU and printf styles are all recognised as placeholders. You can name any other convention in your instructions.
Will the key order change?
No. Keys come back in the order they went in, so a git diff shows only the values that changed.
Is it safe to upload a JSON file to an online translator?
With AI Glot, the file is stored only for as long as the translation needs it, the download link expires after an hour, and it is deleted afterwards. Nothing you upload is used to train any model. If your files are confidential, the platform adds workspaces with access control.
What do I get with an AI Glot account?
No size limit and no daily limit, glossaries so your product names stay yours, translation memory across files, twelve file formats in one workspace, and an API, a CLI and an MCP server if you want this inside your own pipeline.
Other formats
Twelve families in all, each with a workflow built around its own structure.
YAML
Translate the values in a .yml or .yaml locale file while the indentation, key hierarchy, and comments survive the round trip.
XLIFF / XLF
Translate localization units at scale with product terminology and file-specific instructions applied consistently.
Android XML
Translate a strings.xml resource file with names, plural quantities, and format specifiers left exactly where they belong.