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File & conversion tools / Ebook converter6 tools

Best ebook converters

Convert ebooks between EPUB, MOBI, PDF and more. Facts come from each tool's own pages, and every score says where it comes from. How we rank

Tools
6
Researched
4
Free option
1
Only listed
2

Ranked by signals we can measure or quote: website health, the facts each tool's own pages state, and community discussion. Nothing here has been hands-on tested yet, so this is not a quality test. How the signals rank works

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Want two of these head to head? Compare tools side by side.

  • 1

    CloudConvert

    Free optionSignup unclearFiles uploadedHealth 5
    Open CloudConvert
    Details and sources
    Free tier
    The free plan costs 0 euros and allows 10 conversions per day. Maximum file size is 1 GB, maximum processing time is 5 minutes, up to 5 concurrent tasks, low priority. No credit card required.
    Paid plan
    Credit packages (one-time, 1,000 credits that never expire) and monthly subscriptions (1,000 credits per month, no rollover) exist, but the prices were not visible on the page. Enterprise is custom priced. The page does not say if prices vary by country.
    Signup
    The free plan has a Sign Up option; the page does not explicitly say whether an account is needed to convert.
    Watermark
    Not stated.
    Where files go
    Files are sent to and temporarily stored on CloudConvert's servers (Germany, or US-based servers if used from the US). They are deleted immediately when you use the delete button, otherwise within 24 hours at the latest.

    From the tool's own pages, checked 2026-11-01. Sources: Pricing, Privacy. Prices and limits change; check the tool before you rely on them.

    Full page for CloudConvert

  • 2

    Online-Convert

    No free planSignup unclearFiles uploadedHealth 4.8
    Open Online-Convert
    Details and sources
    Free tier
    A free trial plan with no payment details. The FAQ says test credits renew every 24 hours. Limits include limited batch processing and file size, 10 minutes processing time, queued tasks and limited AI tasks.
    Paid plan
    In euros: Pay As You Go 480 credits for 13.00 (one-time, credits expire after one year); monthly subscription 2800 credits for 22.42; 10000 credits for 68.00. A yearly option is said to save 20%, but no yearly prices are shown. Enterprise is custom. Country-based pricing is not mentioned.
    Signup
    The FAQ says you need to create a free account by signing up to get the free credits.
    Watermark
    Not stated.
    Where files go
    Selected files are sent to Online-Convert's conversion servers, with data stored in Europe. Access to the output is blocked after 24 hours (download limit 10 times) and files are physically deleted after 72 hours at the latest. No backups of files are made.

    From the tool's own pages, checked 2026-11-01. Sources: Pricing, Privacy. Prices and limits change; check the tool before you rely on them.

    Full page for Online-Convert

  • 3

    Convertio

    UnclearSignup unclearFiles uploadedHealth 4.3
    Open Convertio
    Details and sources
    Free tier
    Not stated.
    Paid plan
    Prices in USD. Lite $11.99/month ($6.99/month billed yearly), Basic $22.99 ($13.99), Pro $44.99 ($25.99), Custom from $54 ($32.42). Plans differ in max file size (1 GB to 20 GB) and credits per month (1,000 to 1M). Payment methods depend on country; country-based pricing is not mentioned.
    Signup
    Not stated for free conversions. Paid plans link to registration pages.
    Watermark
    Not stated.
    Where files go
    Files are converted on Convertio's servers and kept in the European Union. Input and temporary files are deleted right after conversion; output files are deleted after 24 hours or when you click the X.

    From the tool's own pages, checked 2026-11-01. Sources: Pricing, Privacy. Prices and limits change; check the tool before you rely on them.

    Full page for Convertio

  • 4

    Calibre

    UnclearSignup unclearFile handling unclearHealth 3.6Community 4.1
    Open Calibre
    Details and sources
    Free tier
    Not stated. The home page asks for optional contributions and offers downloads for each operating system; no price is given.
    Paid plan
    Not stated.
    Signup
    Not stated.
    Watermark
    Not stated.
    Where files go
    Privacy page says calibre and its website collect no information about users or visitors, apart from aggregate usage figures. It does not say how files are processed.

    From the tool's own pages, checked 2026-11-01. Sources: Home page, Privacy. Prices and limits change; check the tool before you rely on them.

    Full page for Calibre

Answers come from each tool's own pages (“Unclear” means they do not say). Tick “Compare” on two to four tools to read them side by side.

Also listed (2, not yet tested)

Each of these answered when we visited its site. We have not tested them or recorded facts, so they are in alphabetical order, not ranked.

  • DocToMD

    Free doc to MD converter with no signup. Turn Word (.doc/.docx), PDF, and other files into Markdown that keeps tables and images.

    Open
  • Sigil

    Sigil is listed for: ebook converter.

    Open

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