Free Forever

52 Free Tools for Authors and Self-Publishers

Everything here runs in your browser, needs no account and costs nothing. Work out a royalty, check a manuscript, validate an ISBN, test a cover at thumbnail size or generate a title — then get on with the book.

No sign-upNothing to installFiles never leave your deviceBuilt by formatters

Showing 52 of 52 tools

9 tools

Manuscript & Text

Analyse the words themselves. Length, readability, pacing and the small habits that quietly weaken prose, all measured in seconds from a paste of your text.

Word & Character Counter

Live word, character, sentence and paragraph counts, plus reading time and a book-length verdict.

AnalyserOpen tool

Readability Score Checker

Flesch-Kincaid, Gunning Fog, SMOG and Coleman-Liau scores with a plain-English verdict on who can read it.

AnalyserOpen tool

Writing Goal Calculator

Set a target and a deadline to see how many words a day it takes, and whether you are ahead or behind.

CalculatorOpen tool

Chapter Length Analyzer

Per-chapter word counts, averages, and a flag on any chapter that sits far off your usual length.

AnalyserOpen tool

Filler & Crutch Word Finder

Counts the hedges, filter words and weak intensifiers that pad your prose, ranked by how often you lean on them.

AnalyserOpen tool

Adverb & Passive Voice Checker

Finds -ly adverbs and likely passive constructions, with density scored against sensible genre benchmarks.

AnalyserOpen tool

Word Frequency Analyzer

Ranked single words plus two and three word phrases, with stop-word filtering and a lexical diversity score.

AnalyserOpen tool

Dialogue vs Narrative Ratio

Measures how much of your book is dialogue against narrative, judged against what your genre expects.

AnalyserOpen tool

Title Case Converter

Convert text between proper title case, sentence case, uppercase and more, using real capitalisation rules.

ConverterOpen tool
Done For You

Rather have the interior built for you?

These tools tell you what your book needs. When you would rather hand over the manuscript entirely, we build the print interior and the eBook to spec and hand back files that pass on the first upload.

6 tools

Interior & Formatting

Everything that decides how the finished page looks and what it costs to print, from trim size and typeface to the page count you are billed for on every copy.

Page Count Estimator

Turns a word count into an estimated printed page count for your trim size, type size and line spacing.

CalculatorOpen tool

Book Trim Size Recommender

Recommends the trim your genre and length call for, with two alternatives and the page count each produces.

Book Font Pairing Tool

Body and heading typeface pairings by genre, rendered live so you see the combination before committing.

Print Extent & Cost Reducer

Shows how trim, type size and leading change your page count, your print cost per copy and your royalty.

CalculatorOpen tool

Signature & Page Rounding

Rounds your extent up to the page multiple your printer needs and tells you how many blanks that adds.

CalculatorOpen tool

Typography Unit Converter

Converts between inches, millimetres, centimetres, points, picas and pixels at any DPI you set.

ConverterOpen tool
5 tools

Cover & Print

Check artwork before it reaches a press, generate the codes a cover legally needs, and see your design the way a browsing reader actually meets it.

ISBN Barcode Generator

Turns an ISBN-10 or ISBN-13 into a print-ready EAN-13 barcode, with an optional price add-on, as SVG or PNG.

GeneratorOpen tool

QR Code Generator

Generates a scannable QR code for a link, email or text, with colour control and downloadable PNG output.

GeneratorOpen tool

Image DPI & Resolution Checker

Checks an image's true resolution at your intended print size and says whether it will print sharp or soft.

AnalyserOpen tool

Cover Thumbnail Preview

Shows your cover at real store thumbnail sizes so you can see whether the title still reads when it is tiny.

AnalyserOpen tool

Colour Converter for Print

Converts HEX, RGB and CMYK with a live swatch and warnings about colours that shift badly on press.

ConverterOpen tool
Covers That Convert

A cover has to sell at thumbnail size

You can check DPI and preview a thumbnail here for free. Designing a cover that still reads at 100 pixels, and wrapping it to exact spine and bleed spec, is what our cover team does every day.

8 tools

Metadata & Discoverability

The description, subtitle, keywords and categories that decide whether a reader ever finds your book. This is the work most authors skip and later regret.

Book Description Generator

Build a formatted description using only the HTML tags retailers accept, with live preview and character count.

GeneratorOpen tool

Hashtag Generator

Generates goal-focused hashtag sets by genre and platform, sized to what each network actually rewards.

GeneratorOpen tool

BISAC Category Code Finder

Search 595 official BISAC subject codes by keyword or category and collect the three your book needs.

Book Keyword Generator

Builds long-tail phrases for all seven retailer keyword slots, each checked against the character limit.

GeneratorOpen tool

Book Subtitle Generator

Generates subtitle options from proven formulas, with length warnings for how search results truncate them.

GeneratorOpen tool

Author Bio Generator

Produces a 50, 100 and 200 word bio at once, written in the third person publishing convention.

GeneratorOpen tool

Book Blurb Analyzer

Scores your description for hook strength, length, reading level, stakes and whether it has a call to action.

AnalyserOpen tool

Universal Book Link Builder

Builds clean retailer links across every Amazon marketplace and other stores, ready as HTML or Markdown.

GeneratorOpen tool
12 tools

Money & Strategy

Royalties, printing costs, pricing bands and advertising maths. The numbers that decide whether a book earns, laid out before you commit to a price.

KDP Royalty Calculator

Works out your royalty per copy for eBook and print, including delivery fees and per-page printing cost.

CalculatorOpen tool

KENP Calculator

Estimates Kindle Unlimited earnings from pages read, per full read-through, per month and per year.

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Book Break-Even Calculator

Tells you how many copies you must sell to recover editing, cover, formatting and every other upfront cost.

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Self-Publishing Budget Calculator

Build a full budget line by line at budget, standard or premium quality, and see what it takes to recoup.

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Book Price Point Comparison

Compares royalty at every price point so you can see exactly where the rate thresholds cost or earn you money.

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Kindle Unlimited vs Wide

Compares page-read income against wide sales, and shows the break-even number of reads.

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Amazon Ads ACOS Calculator

Calculates break-even ACOS, actual ACOS, ROAS and whether a campaign is genuinely making money.

CalculatorOpen tool

eBook File Size & Delivery Fee

Estimates your Kindle file size and the delivery fee it quietly costs you on every single sale.

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IngramSpark Royalty Calculator

Works out compensation after wholesale discount and returns, compared against a standard royalty.

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Royalty Split Calculator

Splits royalty income between co-authors, illustrators and narrators, before or after shared costs.

CalculatorOpen tool

Print Cost Comparison

Compares print cost and royalty per copy between two printers side by side, with every rate editable.

CalculatorOpen tool

Amazon Book Sales Calculator

Estimates daily and monthly sales from a best seller rank, using a model you can calibrate yourself.

CalculatorOpen tool
Strategy, Not Guesswork

The numbers are only half the answer

Break-even, ACOS and price bands tell you where you stand. Deciding what to change next, across formats, pricing, categories and platforms, is usually a conversation rather than a calculator.

4 tools

Audiobook

Runtime, production cost and royalty models for authors taking a book into audio, updated for Audible's current rates.

Reading Time & Audiobook Length

Turns a word count into silent reading time, finished audiobook hours and estimated recording time.

CalculatorOpen tool

Audiobook Sales Calculator

Estimates audiobook units and royalties from a rank, using an editable model you can calibrate.

CalculatorOpen tool

Audiobook Production Cost

Works out finished hours, total narration cost and how many sales it takes to break even.

CalculatorOpen tool

ACX Royalty Calculator

Calculates audiobook royalties on Audible's 2026 model, with the retiring legacy rates there to compare.

CalculatorOpen tool
3 tools

Planning & Validators

Dates, checks and identifiers. The unglamorous admin that has to be correct before you press publish, and that costs real time when it is not.

Book Launch Timeline Planner

Enter a launch date and get every milestone dated backwards, from manuscript lock to post-launch reviews.

PlannerOpen tool

ISBN Validator & Converter

Validates ISBN-10 and ISBN-13 check digits, converts between them, and checks a whole batch at once.

ConverterOpen tool

ISBN Hyphenation Tool

Inserts the correct hyphens into any ISBN and labels what each segment of the number actually means.

ConverterOpen tool
Upload With Confidence

Stuck at the upload screen?

Validators and checklists catch a lot. If a file has already been rejected, or you would simply rather someone else clicked publish, we run the whole submission for you and keep your account in your name.

5 tools

Generators

Naming and front-matter help for the moments when a blank page is the actual problem, from titles and pen names to a finished acknowledgements page.

Book Title Generator

Generates genre-aware title ideas from proven structural patterns, built around a theme word you choose.

GeneratorOpen tool

Book Series Name Generator

Creates a series name plus matching titles for books one to three, so the naming stays consistent.

GeneratorOpen tool

Pen Name Generator

Generates pen names that suit your genre and read well aloud, including initial-led variants.

GeneratorOpen tool

Character Name Generator

Names by origin, era and character role, with a fantasy mode that builds invented names from syllables.

GeneratorOpen tool

Dedication & Acknowledgements

Writes dedication options by tone and assembles a properly ordered acknowledgements page from your fields.

GeneratorOpen tool

No tools match that search

Try a broader word such as royalty, ISBN, cover, word count or audiobook — or reset the filters to see all 52.

When the tool says the work is bigger

We Format, Design and Publish the Book Itself

The calculators tell you the numbers. When you would rather hand over the interior, the cover or the upload entirely, that is what we do every day — to spec, first time, for any platform.