What it is
Doc2Lang is an AI-powered document translation service that converts content across a wide range of file types while preserving original layout and formatting. The platform applies context-aware machine translation driven by modern GPT models, focusing on translating ideas rather than performing literal, word-by-word substitutions. Built-in optical character recognition (OCR) enables extraction and translation of text from scanned PDFs and images.
The service accepts documents, spreadsheets, presentations, eBooks, subtitle files, audio, and video, and returns translated files in the same or compatible formats. It offers a preview workflow that provides a partial sample translation at no charge and uses pay-per-use billing for completed translations.
Primary users include businesses, localization teams, content and marketing teams, translators, and publishers that require translated deliverables that retain original structure and design.
Key features
Doc2Lang supports a broad set of input formats and file variants, including DOCX, PPTX, multiple Excel formats (XLSX, XLSM, etc.), PDF, EPUB, HTML, IDML (InDesign), CSV, and common image types (JPG, PNG, GIF, WebP). Subtitle support includes SRT, WebVTT, and ASS.
The platform handles media files—video containers such as MP4, AVI, MOV, MKV, WebM and audio formats including MP3, WAV, M4A, OGG, AAC, and FLAC—extracting speech for transcription and translating resulting text. Subtitle and caption translations preserve timestamps, cue settings, styling, and positioning.
Formatting preservation extends to fonts, graphics, bullet points, formulas, table of contents, chapter structure for EPUB, speaker notes, and embedded media when available. Workflow features include custom glossaries for consistent terminology, batch upload via ZIP extraction, free sample previews with retranslation options, one-click translation, and the ability to delete uploaded files. Billing is pay-per-use without subscriptions.
Use cases
Marketing and sales teams can translate PowerPoint presentations and speaker notes while keeping slide layout and embedded media intact for international pitches and webinars. Localization teams and translators can convert Word documents, technical manuals, and policies using custom glossaries to maintain consistent terminology.
Finance and operations groups can translate Excel spreadsheets and CSV files while preserving formulas and cell structure for reporting and analysis. Media producers, educators, and podcasters can localize video and audio content by extracting transcripts, translating subtitles, and retaining timing and styling for playback.
Publishers and authors can translate EPUBs and InDesign IDML files while preserving table of contents, chapter structure, typography, and layout for eBook and print workflows.
