PDF IN · MOBI OUT · FOR MOBI-ONLY APPS

MOBI on your phone, if that's what your app wants.

Name: PDF to Mobi Phone Cyborg
Price: 1.00 EUR
Author: AppsCyborg

Most phone readers take ePub now, but some don't — and a library already built on MOBI is a good reason to stay with it. This turns a PDF into a MOBI that reflows to the screen at your font size, with no cable and no send-to-device service involved.

No watermark, no reading account, nothing kept

Convert a PDF to MOBI reflowable

Drop a PDF here or browse

A full A4 page of small print, the whole page shown at once

PDF — A4 page, thumbnail type The same text reflowed to a narrow phone page at a comfortable size

MOBI — reflowed, one thumb

field-handbook-2e.mobi · titled after your file Ready

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Do you actually want MOBI?

On a phone, this is worth a moment's thought: ePub is the current standard and opens in more apps. MOBI is the right answer when something you already use is built on it.

Use this tool if…

Your reading app takes MOBI and not ePub — Moon+ Reader, Librera, KyBook and similar.
Your sideloaded library is already all .mobi and you want it to stay consistent.
You move the same files between a phone and an older Kindle.
You tried an ePub and the app you like wouldn't open it.

Use the ePub version if…

You read in Apple Books or Google Play Books — neither will open a MOBI.
You have no particular reason to prefer MOBI. ePub is the safer default.
You want the file to still open in whatever you're using in five years.
Your PDF is a scan. This tool refuses those; the ePub one fits the pages to the screen as images.

Go to PDF to ePub Phone Cyborg →

Test one file before you convert a shelf. Whether an app takes MOBI is the sort of thing that is quicker to check than to look up, and one pass covers every tool here, so getting it wrong costs nothing but a minute. Two other things are worth knowing before you start. The conversion is a trade — a fixed PDF page becomes a river of text, which is excellent for a report or a novel and poor for a magazine, a two-column paper or anything where the layout carries meaning. And a scanned PDF is refused outright rather than converted badly: pictures of pages have no text to reflow, nothing here does OCR, and an image-only MOBI is not something we can promise your app will open. Send those to PDF to ePub Phone Cyborg instead, which fits the pages to the screen. Up to 50 files at 200 MB each, and your download link stays live for 60 minutes.

Your phone opens PDFs already. So what?

It opens them and renders the whole page, which on a phone means eight-point type. So you zoom in, and now you're dragging sideways to finish every line.

One thumb, no zooming

Lines end where the screen ends, so reading is scrolling or tapping — never panning.

Locations & highlights work

Progress, bookmarks, notes and dictionary lookups behave as they do in a bought book.

Nothing joins a library

No cloud reading account involved — useful when the PDF is a work document. Files go after 60 minutes.

One day for €1

A 24-hour day pass costs €1. No subscription, no auto-renewal — decide later.

PDF to Mobi Phone Cyborg vs. the alternatives

	PDF to Mobi Phone	Phone PDF viewer	ePub instead	Calibre on a computer
Text reflows to the screen	Yes	No — zoom and pan	Yes	Yes
Opens in a MOBI-only app	Yes	Not applicable	No	Yes
Opens in Apple / Play Books	No	PDFs, yes	Yes	Depends on output
Works from the phone itself	Yes	Yes	Yes	No — needs a desktop
Format's long-term future	Legacy	Universal	Current standard	Your choice
Keeps exact page layout	No — that's the trade	Perfectly	No	No
Handles scanned pages	No — refused, with a reason	Yes, as images	As fitted page images	Only with OCR set up
Price	from €1	Free	from €1	Free

Honest guidance, and it points away from this page more often than not. Your phone's own PDF viewer is free and fine for anything short. If you have a computer to hand and convert often, Calibre is free and does more. And unless something in your setup actually requires MOBI, the ePub version of this tool is the better default — same price, same account, a format that will keep opening. Come here when an app you already use, or a library you already have, is built on MOBI. The same €1 covers that and the other 78 tools either way.

See it in action

A short walkthrough: a PDF in, a MOBI in your phone's reading app.

Ready to try it? Create your account above.

When MOBI is the right call

Not often, and that's worth saying. These are the cases where it is.

pinching required

watermarks & ads

minutes to download

€1

for a whole day of it

One library, two devices

The same files read on the phone and on an older Kindle, without keeping two copies in two formats.

A reader app you like

Moon+ Reader, Librera, KyBook — good apps with settings you've spent years getting right. No reason to leave them.

The commute

Forty minutes standing up, one hand on a rail. The only reading position a PDF genuinely cannot survive.

Reports & handbooks

A hundred pages to have read before the meeting, and no laptop time left to do it in.

Bigger type

Reflowing is what makes a large font size possible at all. A zoomed PDF just needs more panning.

Offline & no account

It's a file on the phone, so it reads on a plane without a connection or an app logging in.

Whatever it's for, upload the PDF and download the MOBI.

Need something slightly different?

Would ePub work for your app? PDF to ePub Phone Cyborg. Reading on a Kindle or Kobo? PDF to Mobi eReader Cyborg. Need to edit the text rather than read it? PDF to Word Cyborg — all included in one account.

Browse all 79 tools →

Common questions

MOBI on a phone

Which phone apps open MOBI?

On Android, readers like Moon+ Reader, Librera and KyBook handle MOBI. Apple Books and Google Play Books don't — they want ePub. If you're unsure, convert one document and try opening it before doing the rest.

Should I just use ePub instead?

Probably, if nothing in your setup requires MOBI. ePub is the current standard, opens in more apps and will keep opening in future ones. MOBI is worth choosing when an app you already use, or a library you already have, is built on it. The ePub version is here and costs the same, because one pass covers every tool.

How do I get the file into my reader?

It's an ordinary file, so any route works: convert here in the phone browser and tap the download, save it to a cloud folder and open it from there, or send it to yourself in a message. No cable, and no send-to-device service — Amazon stopped accepting MOBI that way.

What makes this the "phone" version?

Nothing at all, and this is the one page in the family where we can put a number on it. The conversion code here and in the e-reader version is the same file apart from the name stamped on the output. Run the same 14-page PDF through both and you get a 21,092-byte MOBI either way, differing in 68 bytes: the creation timestamp and a generated identifier. From there on the two files are identical, byte for byte. Whichever of the two pages you landed on, you get the same book.

Will my PDF convert well?

What happens with a scanned PDF?

It's refused, and you're told why. A scan is a picture of a page — there's no text in it to reflow and nothing here does OCR. We could hand you a MOBI of page images instead, but measured on the same document that comes to 13 MB of pictures that even desktop e-book software won't reopen, so it isn't worth your €1. Send scans to PDF to ePub Phone Cyborg instead: it fits the pages to a phone screen and produces a file that works. To check before you upload, try selecting a sentence in your PDF viewer — if the text highlights, it's real text and it converts here.

What comes out badly on a phone in particular?

Wide tables are the worst case — a table built for A4 has nowhere to go in a narrow column, and no conversion fixes that. Two-column journal PDFs need the reading order guessed and can interleave oddly. Magazines and music scores lose the thing that made them work. Prose in one column is the happy case.

Do page numbers survive?

No — reflowed text has locations rather than pages, because a page depends on the font size you chose. Occasionally an old running head or page number survives as a stray line in the flow; most documents come through clean.

Can I send a whole folder at once?

Up to 50 files a go, 200 MB each, and they come back together. Each one converts on its own, so a file that fails — or a scan that gets refused — doesn't take the rest with it.

Can it convert a password-protected PDF?

No. Locked or DRM-protected files won't open here, and removing that protection isn't something this does. It fails cleanly and tells you, rather than handing back something broken. Use it on documents you're entitled to read and reuse.

Pricing & privacy

What happens to my document?

It's used to make the MOBI and then deleted along with it when the 60-minute link expires. Nothing is kept, read, indexed or used to train anything, and it never joins a reading service's library — which matters when the PDF is a work document rather than a novel.

If MOBI turns out to be wrong, do I pay again?

No. One pass covers every AppsCyborg tool, so if your app refuses the MOBI, converting the same PDF to ePub costs nothing extra. That's why testing one file first is cheap advice to follow.

How much does it cost?

A €1 day pass gives you 24 hours of unlimited conversions. Yearly is €6 and lifetime is €30. All three are one-off payments — no auto-renewal, no second charge next month — and every plan unlocks all 79 AppsCyborg tools, with a 7-day money-back guarantee.

Can I publish or sell the result?

That depends on the document, and it isn't ours to decide. Converting something you wrote, or hold the rights to, is fine. Converting someone else's book to redistribute it is not — changing the file format doesn't change the copyright.

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Up to 50 files From €1, no subscription Files deleted after 60 min