Continuous Reading Filter
No need to manually select paragraphs and paste them into AI with instructions. Just scroll down, and complex text is automatically transformed into fluent, easy-to-read content in your preferred style.
AI-Powered Reading Companion
No more struggling with cluttered PDFs and endless copy-pasting.
Redia seamlessly transforms complex papers into clear summaries, highlights, or diagrams.
It reads as if it were written just for you.
Stop enduring PDFs and window chaos. Start reading with real flow.
Free Papers from Clutter
Extract PDF content and reorganize it into a comfortable single-column article. Font size, line height, and width are all up to you.
Line-by-Line Alignment
Say goodbye to worries about AI mistranslation. Line-level precise alignment ensures every data point and argument is fully traceable.
Evidence-Based AI Discussion
Discuss and ask questions about your documents with state-of-the-art AI models. Every answer comes with source links — click to jump directly to the original passage. No more searching for a needle in a haystack.
Zoom in Zoom out
Seamlessly switch between full-book summaries, chapter outlines, and the original text. Get the big picture first, then zoom into the details.
“ Text should adapt to people,
not the other way around. ”
Plans & Pricing
Choose the plan that best fits your reading and translation workflow.
Guest
Free access to core translation and reading guidance
$0/month
Process 5 papers or documents, then 1 free every 2 days
PDF limit: 50 pages per document
Basic AI reading guidance, translation, and summaries
50 conversations per day
3 knowledge visualizations
Master
Advanced plan for deep translation reading, cancel anytime
$8/month
No charge during the trial. Cancel anytime before renewal.
Use the most advanced AI models across providers to support your work
High-precision translation with hover-to-compare original text
Learns your preferred wording and terminology
Unlimited paper and document processing
Support for long PDFs (up to 1,000 pages)
Use custom text filters and personalized glossaries
Einstein
Beta$20/month
Coming Soon
Unlimited power for knowledge workers and researchers
FAQ
Still undecided? We've compiled the most common questions to help you make your decision.
What file formats does Redia support?
Redia currently supports the following formats:
- PDF documents: Papers, books, reports, and more
- EPUB e-books: Common e-book format
- Web articles: Simply enter a URL to capture content
How accurate is the translation?
Redia uses state-of-the-art AI language models for translation, delivering high accuracy.
More importantly, we provide line-by-line alignment, allowing you to verify the original text against the translation at any time to ensure accuracy of critical information.
Can I use it offline?
Redia requires an internet connection for AI translation and analysis features.
However, once a document has been processed, you can read the processed content even with a poor connection.
Are there educational discounts?
We are currently planning educational discount programs. Stay tuned!
If you are a student or educator, feel free to join our Discord community for the latest updates.
How is Redia different from pasting an article into ChatGPT?
Great question — this gets to the core advantage of our architecture.
When you paste a long document directly into a conversational AI, it often unconsciously shortens or summarizes the content to fit a single response, even if you ask it not to. This can result in incomplete translations. Moreover, the longer the text processed at once, the more likely the AI is to make contextual errors, affecting accuracy.
Redia fundamentally solves this problem. Instead of feeding the entire article to the AI at once, we first understand the full context, then process it sentence by sentence with precision. This ensures two things:
- No silent summarising: Passages are translated in place, so nothing gets skipped just to keep the answer short.
- Higher accuracy: By working with smaller processing units, the AI can focus better on contextual details, dramatically improving translation accuracy and fluency.
Every line keeps the original alongside it, and every AI answer carries a source link you can follow.
In short, ChatGPT is like a generalist who helps occasionally, while Redia is a professional tool purpose-built for deep, long-form translation reading.
Can I cancel anytime after upgrading?
Yes. Your selected monthly or yearly plan renews automatically. You can cancel anytime in Settings, and it will not renew after the current billing period.
Read your next document with confidence
Upload one PDF and see what reading feels like when the original stays alongside.