DeepL Free

Translate text and documents with DeepL — no login, no API key required.

Features

• No authentication or API keys needed
• Automatic source language detection
• 39 languages supported
• Document translation (PDF, DOCX, PPTX)
• Lightweight: only depends on requests

Installation

pip install deepl-free

Usage

from deepl_free import DeepL

d = DeepL()

d.translate("Hello world", target="es")
# Hola mundo

d.translate("مرحبا بالعالم", target="en")
# Hello world (source auto-detected)

d.translate("Good morning", target="ar", source="en")
# صباح الخير

d.detect("Bonjour le monde")
# FR

data = d.translate_file("report.pdf", target="ar")
open("report_ar.pdf", "wb").write(data)

translate(text, target="en", source="auto")

translate_file(path, target="en", source="auto")

Translates a document (PDF, DOCX, PPTX) and returns the translated file as bytes.

detect(text)

Returns the detected source language code (e.g. FR).

languages()

Returns a dict mapping language codes to language names.

How it works

The library replicates DeepL's public web flows — language tables are extracted at runtime and document uploads use the same endpoints as the web translator — nothing for you to configure.

License

MIT