Name the fields in a sentence
Say which fields hold text. It reads the records and shows you what it understood before anything runs.
Instructions for this batchOptional
ApplyFree AI-powered JSON Lines files translator
Translate a whole JSON Lines file at once. Say what you need in plain English. The keys, tags and delimiters stay where they are.
Drop your JSON Lines file here
Up to 2 MB, five files a day. Nothing to install, no account.
What changes when you translate the whole file at once
One glossary across every record
The term approved in record 4 is the term used in record 4,000, and in the next dataset too.
French glossaryApplied
checkoutpaiementnot caisse
seatlicencenot siège
ticketdemandenot billet
Two speeds, chosen per file
Lite for a large dataset, Standard for copy a customer reads. Chosen per upload.
Translation qualityThis file
Standard1 credit per word
Lite1 credit per 3 words
What comes back
Keys are structure, not words. Each record goes in on its own line and comes back on its own line, compact, with its fields in the order you sent them.
JSONLEN → French
{"id": 1041, "title": "Wireless charging pad", "price": 39.0}Chargeur à induction", "price": 39.0}
{"id": 1042, "title": "Solid oak desk shelf", "price": 129.0}Étagère de bureau en chêne massif", "price": 129.0}
{"id": 1043, "title": "Charges two devices at once", "price": 49.0}Recharge deux appareils à la fois", "price": 49.0}
Structure read · values written
How a JSON Lines translation runs
1. Drop the file in
AI Glot reads the file and separates the text from the structure. It then tells you how much there is to translate, before anything runs.
products.jsonldataset.ndjsonreviews.jsonl
2. Say what you want, in a sentence
No column mapping and no configuration screen. Write what you need, then read the plan it produced. If it misread you, say so and it plans again.
How to translate this file?
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
3. Get the same file back
One file comes back, translated. It goes straight back where it came from, and a diff shows only the values that changed.
fr-FR
de-DE
es-ES
ja-JP
products_localized.jsonl
What people bring us JSON Lines files for
Four jobs that come up again and again. Each one is one upload and one sentence.
A dataset for a multilingual model
Translate the text fields of thousands of records in one job. Ids and labels are not words, so they are not touched.
A catalogue export
Product titles and descriptions in a one-record-per-line export, ready to load back into your pipeline.
Reviews and support messages
Read what customers wrote in any language. Free-text fields are translated in bulk so you can search them.
Windows app resources
A .resjson file is read as JSON, so Windows app string resources translate the same way.
Questions about translating JSON Lines files
What is the best tool to translate a JSON Lines file?
AI Glot. It translates a full JSON Lines file in one job, at a quality you can steer with a glossary and a plain-English brief. You describe what you need. You do not map fields or split the file. The tool on this page runs it with no account.
How do I translate a JSON Lines file without breaking it?
Use a tool that reads the format instead of the raw text. Upload the file above and say what to translate. Read the plan, then run it. AI Glot returns one valid JSON Lines file, so it goes straight back where it came from.
Can I translate a JSON Lines file for free?
Yes. The tool on this page is free. No account and no card. Five files a day, up to 2 MB each, and up to 5,000 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 Lines 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 Lines file would not open, and a sample you cannot open tells you nothing. An AI Glot account removes the limit.
What is the difference between JSONL and NDJSON?
None for our purposes. Both are one JSON record per line, and both are read and written back the same way.
What if one line is broken?
The file is refused and the message names the line number, so you can fix that one record and upload again.
Will the records keep their key order?
Yes. Each record is written back compact, on one line, with its keys in the order they went in.
Is a normal JSON file the same thing?
No. A file with one big object or array is a JSON file and has its own page. Files ending in .resjson are read as JSON.
Is it safe to upload a JSON Lines file to an online translator?
AI Glot keeps the file only as long as the translation needs it. The download link expires after an hour. The file 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 keep your product names consistent, and translation history keeps the team in sync between files. More than 35 formats share one workspace, and an API, a CLI and an MCP server put the same engine in your own pipeline.
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