Describe it, do not configure it
Describe it rather than configure it, and read the plan back before it runs.
Instructions for this batchOptional
ApplyFree AI-powered Java .properties files translator
Translate a whole Java .properties file at once. Say what you need in plain English. The keys, tags and delimiters stay where they are.
Drop your Java .properties 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
Consistent terms across every bundle
A glossary settles your application's vocabulary and applies it to every bundle you send.
French glossaryApplied
checkoutpaiementnot caisse
seatlicencenot siège
ticketdemandenot billet
Two speeds, chosen per file
Lite for log and admin messages, Standard for anything a customer reads. Chosen per upload.
Translation qualityThis file
Standard1 credit per word
Lite1 credit per 3 words
What comes back
Keys, separators, comments and message-format placeholders are preserved. The bundle returns as UTF-8, ready for the classpath of a modern Java or Spring application.
Java .propertiesEN → French
# Product page
cart.add=Add to cartAjouter au panier
cart.count={0} items in cartarticles dans le panier
cart.empty=Your cart is emptyVotre panier est vide
price.from=From {0,number,currency}À partir de {0,number,currency}
Structure read · values written
How a Java .properties 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.
messages.propertieserrors.propertieslabels.properties
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
messages_localized.properties
What people bring us Java .properties files for
Four jobs that come up again and again. Each one is one upload and one sentence.
A Java or Spring application
messages.properties becomes messages_fr.properties. Your code does not change.
MessageFormat placeholders
MessageFormat placeholders return in the position the target language needs.
UTF-8 bundles
Bundles saved as UTF-8 are read and written back as UTF-8, which modern Java and Spring load directly.
A release catch-up
Only the keys added since last time, so reviewed values are left alone.
Questions about translating Java .properties files
What is the best tool to translate a Java .properties file?
AI Glot. It translates a full Java .properties 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 Java .properties 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 Java .properties file, so it goes straight back where it came from.
Can I translate a Java .properties 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 Java .properties 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 Java .properties file would not open, and a sample you cannot open tells you nothing. An AI Glot account removes the limit.
Is the encoding handled?
Files are read and written as UTF-8. A bundle in the old ISO-8859-1 form should be saved as UTF-8 first, which Java 9 and later reads by default.
What about a value that continues on the next line?
Line continuations with a trailing backslash are not supported yet: only the first line of such a value is translated. Put each value on one line before you upload.
Do MessageFormat arguments survive?
They are protected by your instructions: {0} keeps its index and {0,number,currency} keeps its format type, so the value still formats at runtime.
Can I keep my comment headers?
Yes. Comments are structure and stay attached to the keys below them.
Is it safe to upload a Java .properties 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.
More free file translators
More than 35 formats, each with a workflow built around its own structure.
PO / POTTranslate a gettext catalog with message IDs, contexts and plural forms handled as the structure they are.RESXTranslate a .resx resource file with data names, metadata, and the XML schema returned untouched.YAMLTranslate the values in a .yml or .yaml locale file while the key hierarchy and order stay as they were.