--- title: "Free AI-powered Java .properties files translator" description: "Translate Java .properties bundles at scale. Keys, separators, comments and MessageFormat placeholders are kept, and the file is written back as UTF-8." language: en canonical: https://ai-glot.com/file-formats/properties-translation source: AI Glot website --- # Free 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. [Start with AI Glot](https://app.ai-glot.com/signup) ## What changes when you translate the whole file at once ### Describe it, do not configure it Describe it rather than configure it, and read the plan back before it runs. ### Consistent terms across every bundle A glossary settles your application's vocabulary and applies it to every bundle you send. ### Two speeds, chosen per file Lite for log and admin messages, Standard for anything a customer reads. Chosen per upload. ## 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. ## 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. ### 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. ### 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. ## 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 / POT Translate a gettext catalog with message IDs, contexts and plural forms handled as the structure they are.](https://ai-glot.com/file-formats/po-translation) [RESX Translate a .resx resource file with data names, metadata, and the XML schema returned untouched.](https://ai-glot.com/file-formats/resx-translation) [YAML Translate the values in a .yml or .yaml locale file while the key hierarchy and order stay as they were.](https://ai-glot.com/file-formats/yaml-translation) [JSON](https://ai-glot.com/file-formats/json-translation) [ARB](https://ai-glot.com/file-formats/arb-translation) [JSONL](https://ai-glot.com/file-formats/jsonl-translation) [TOML](https://ai-glot.com/file-formats/toml-translation) [XLIFF / XLF](https://ai-glot.com/file-formats/xliff-translation) [SDLXLIFF](https://ai-glot.com/file-formats/sdlxliff-translation) [FTL](https://ai-glot.com/file-formats/fluent-translation) [Android XML](https://ai-glot.com/file-formats/android-xml-translation) [XML](https://ai-glot.com/file-formats/xml-translation) [iOS .strings](https://ai-glot.com/file-formats/ios-strings-translation) [XCSTRINGS](https://ai-glot.com/file-formats/xcstrings-translation) [INI](https://ai-glot.com/file-formats/ini-translation) [PHP](https://ai-glot.com/file-formats/php-translation) [Qt TS](https://ai-glot.com/file-formats/qt-translation) [All free tools](https://ai-glot.com/file-formats) ## Ready to translate your Java .properties file? [Create a free account →](https://app.ai-glot.com/signup) Your first 5,000 words free