Free tools
Your Deep Research reports, on your Kindle instead of a browser tab
Turn a Deep Research report (ChatGPT, Gemini, Claude) into an EPUB with chapters and a table of contents. Paste the Markdown or upload the .docx.
Download the EPUB
For USB transfer, Calibre, or Amazon's «Send to Kindle» app.
The EPUB is built in your browser: your report never touches our server unless you choose to email it.
How it reaches your Kindle
Approve our sender at Amazon (first time only)
Amazon only delivers documents from senders you have approved, and it discards everything else without telling you — no bounce, no error message. Add this address to your approved list:
send@books.getsapiens.comOpen your Amazon document settings Once there: Preferences → Personal Document Settings → Approved Personal Document E-mail List → Add a new approved e-mail address.
Buy from a different Amazon store? Open the same page on yours — amazon.co.uk, amazon.es, amazon.com.mx and the rest all have it.
Copy your own @kindle.com address
It's on that same Amazon screen, under «Send-to-Kindle E-Mail Settings». Each device has its own, shaped like name_123@kindle.com. This is your Kindle's address, not the email you sign in to Amazon with.
Paste, send, sync
Paste your text above, enter your @kindle.com address and hit send. With your Kindle on wifi, the book lands in your library within a couple of minutes.
Forty pages of report is not a browser-tab read
Deep Research writes at the length of a short book and then hands it to you in the worst reader available: a scrolling panel next to a chat box. The report already has the structure a book needs — headings, sections, a citation for everything — so this page uses it. Each heading becomes a chapter, the table of contents comes out navigable, and the whole thing lands on the device you already read long things on. Paste the Markdown or upload the .docx; either way it is bound inside your browser.
- Takes the report as pasted Markdown or plain text, or as an uploaded .md, .txt or .docx — the export Word and Google Docs give you.
- Headings become chapters at whichever level the report repeats, so a long report arrives navigable instead of as one endless page.
- Keeps prose, lists, quotes and code. Tables and images do not survive the trip, so check whether your report leans on them before you send it.
- No length worth worrying about: a hundred-page report is still a small EPUB.
- Download it, or have it emailed to your Kindle from this same page.
Deep Research on a Kindle: what to expect
Which formats can I bring?
Pasted Markdown or plain text, or an uploaded .md, .txt or .docx. PDF is not read here — if your report is already a PDF, email it to your @kindle.com address directly.
Gemini puts its reports in Google Docs. What do I do?
In Google Docs, File → Download → Microsoft Word (.docx), then upload that file here. Copying the text works too, though you keep fewer of the headings that become chapters.
Do the citations and source links survive?
The text of a citation does; the link does not — links are dropped along with images and tables. For a report whose value is in its sources, keep the original tab open as well.
Is anything uploaded?
No. The .docx is unpacked and the EPUB built inside your browser. Only the optional email step sends the finished file anywhere.
Can I read it in the Kindle app rather than on a device?
Yes. Documents you send land in your Kindle library, so they sync to the phone and tablet apps as well as to the device — and an EPUB you downloaded can be opened there too.
Like the tools? Wait until it writes you a course.
These are free because they're the easy part. The product turns a topic into a course you'd actually read — and sends it to the same Kindle.
More free tools
Send anything to your Kindle, turned into a book
Paste text or Markdown — a ChatGPT answer, a report, your notes — and get a chaptered EPUB. Download it, or send it straight to your Kindle.
Your PDFs on your Kindle, as books rather than photographs of pages
Upload a PDF and get an EPUB with reflowable text and real chapters, so the type resizes and the page turns. Download it, or send it straight to your Kindle.
Kindle to PDF: the honest answer, and what to do instead
Wanting a Kindle book as a PDF turns out to mean five quite different things. One of them is genuinely impossible. The other four take about a minute — find yours below.
Export your Kindle highlights, organized by book
Upload My Clippings.txt and get your highlights and notes organized by book — Markdown for Obsidian, CSV for Excel, or a Notion import. Nothing is uploaded.
Turn your Kindle vocabulary into Anki flashcards
Turn your Kindle's vocab.db into Anki flashcards that keep each word's original sentence, or into a clean CSV. It all runs in your browser.
Turn your ChatGPT conversations into a book for your Kindle
Paste a ChatGPT, Claude or Gemini conversation and get an EPUB with one chapter per question. Download it, or send it straight to your Kindle.
Take your Notion pages to your Kindle, turned into a book
Upload your Notion export ZIP and get an EPUB with one page per chapter. Download it, or send it straight to your Kindle. The ZIP stays in your browser.
From your Obsidian vault to your Kindle, no plugins
Pick several .md notes and get an EPUB with one note per chapter, ready for your Kindle. No plugin to install; your notes stay in your browser.
Word counter, with characters, sentences and reading time
Count words, characters and sentences as you type, and see how long the text takes to read. Everything runs locally — your text never leaves the browser.
Slug generator, for URLs that read like their title
Turn any title into a clean, URL-safe slug — lowercase, hyphens, accents folded away. Copy it with one click.