AI Document & Text Translator
Upload a PDF or TXT file — or type directly — and translate it into 70+ languages instantly. 100% private, runs in your browser, no uploads to any server.
Awaiting Engine Activation
Processing on Device•100% PRIVATE
You can also drag & drop a PDF or TXT file onto the input area.
Everything You Need for Private Document Translation
PDF & TXT File Upload
Upload any PDF or plain-text file and translate its full content. Drag and drop onto the input area or use the file picker. Text is extracted locally — no upload to any server.
Auto Language Detection
Just start typing or upload a file — the AI instantly identifies the source language using Unicode script analysis and word-frequency scoring across all 70+ supported languages.
100% Private & Offline
Translation runs entirely inside your browser using WebAssembly and WebGPU. Your text, documents, and translations never leave your device — ever.
Download Translated File
After translating a document, download the result as a .txt file named after your original file. Perfect for saving, sharing, or archiving translated content.
How It Works
Simple, fast, and secure. Get your file processed in 3 easy steps.
Upload or Paste Your Content
Drop a PDF or TXT file onto the translator, or type and paste text directly. The AI reads your document locally — nothing leaves your browser.
Language Auto-Detected Instantly
The source language is identified automatically as you type or after a file is loaded. You only need to choose the target language.
Translate & Download
Hit 'Translate File' and track progress as each section is processed. Copy the result or download it as a .txt file — all for free.
Why Choose PDFaiGen?
We are building the future of document processing — focusing on privacy, speed, and design.
100% Privacy Guaranteed
No cloud uploads. Your files are processed entirely on your device using WebAssembly technology.
Lightning Fast
Zero upload time. Zero download time. Instant processing powered by your own hardware.
Easy to Use
Simple drag-and-drop interfaces designed for efficiency. No accounts or sign-ups required.
Common Use Cases
See how others are using this tool to save time and improve workflows.
Translate Legal & Business PDFs
Upload contracts, reports, or business proposals and get a full translation without sending sensitive documents to any cloud service.
Academic Research
Translate foreign-language papers, studies, and academic articles into your language instantly — offline and for free.
Language Learning
Paste texts in your target language and compare the translation side-by-side to build vocabulary and grammar skills.
Travel & Communication
Translate phrases, menus, signs, or itineraries — even offline after the model is loaded once in your browser.
Confidential Work Documents
Translate internal memos, HR documents, or strategic plans with zero risk of data leaks — processing stays 100% on your device.
Multilingual Content Creation
Writers and marketers can draft content in one language and translate it into others instantly, keeping ideas private until ready to publish.
Complete Guide: How to Translate PDFs & Text with AI
PDFaiGen's AI Translator brings powerful document translation directly into your browser — no sign-ups, no API keys, no cloud uploads. Upload a PDF or TXT file, let it auto-detect the source language, and translate the entire document chunk by chunk with a visible progress bar. Download the finished translation as a .txt file in seconds.
Upload a File or Type Your Text
Click the 'Upload File' button at the top of the source panel — or drag and drop a PDF or TXT file directly onto the input area. The file's text is extracted locally and displayed in the editor so you can review or edit it before translating. Alternatively, just type or paste any text directly.
Let Auto Detect Identify the Language
The source language selector defaults to 'Auto Detect'. Within 400ms of typing or loading a file, the tool identifies the language using Unicode script analysis (for Chinese, Japanese, Korean, Arabic, Hindi, Russian) and common-word frequency scoring (for English, Spanish, French, German, Italian, Portuguese). The detected language appears as a green badge below the selector.
Choose Your Target Language
Open the target language dropdown and pick one of the 12 supported languages: English, Spanish, French, German, Italian, Chinese, Hindi, Arabic, Japanese, Korean, Russian, or Portuguese. The AI model (M2M-100 418M) supports all of these with high-quality bidirectional translation.
Translate — Text or File Mode
For short typed text, translation starts automatically after a 1-second pause — no button click needed. For uploaded files, click 'Translate File'. Large documents are split into paragraphs and translated sequentially, with a progress bar showing 'Translating part X of Y'. You can watch the output build in real time.
Copy or Download Your Translation
Once complete, click 'copy' to copy the full translation to your clipboard. If you translated a file, a 'download .txt' button also appears — clicking it saves the translation as a plain-text file named after your original document (e.g. report_fr.txt).
Pro Tips
- For best PDF translation results, use text-based PDFs (not scanned images). The extractor reads real text — scanned pages have no extractable content.
- Auto Detect works best with 20+ characters. For very short phrases, manually select the source language for accuracy.
- The AI model is cached after the first download (~418MB). Subsequent uses — even offline — are instant with no re-download.
- For large documents, the translator splits content at paragraph and sentence boundaries. Each chunk is translated independently, then joined — so formatting is preserved.
Common Issues
Uploaded PDF shows no text?
The PDF is likely scanned (image-only). Our extractor reads native PDF text layers — it cannot OCR images. Try copying the text manually and pasting it into the input area instead.
Language not auto-detecting correctly?
Auto detection needs at least 20–30 characters to be reliable. For very short or mixed-language texts, manually select the source language from the dropdown for the most accurate result.
Translation output looks cut off?
Very long documents are split into chunks of ~800 characters each and translated one at a time. All parts are joined automatically at the end — if you stopped translation early, only completed chunks will appear.
Your Privacy is Our Priority
Unlike other online tools, PDFaiGen processes your files directly in your browser. No file uploads, no server data breaches.
Zero Uploads
Files never leave your device. All processing happens locally in your browser memory.
End-to-End Private
Since no data is sent to any server, your sensitive documents remain completely private.
Works Offline
Once loaded, our tools work without an internet connection. No data usage required.
Translate Any Document Free
Upload a PDF or TXT file, auto-detect the language, and translate it into 12 languages — all inside your browser with zero data leaving your device.
No credit card required • No installation • 100% Private