Free & open

Free Publishing Tools

Practical tools for publishers, editors, and content creators. Validate your EPUBs, check accessibility, estimate savings — all free, all instant.

For everyone

Universal tools that work for any catalog or content team.

EPUB Checker

Validate your EPUB files for structure, metadata, content integrity, and best practices. Get a quality score and detailed issue report.

Check your EPUB

Buch-Metadaten-Extraktor

Laden Sie ein PDF oder EPUB hoch und erhalten Sie die wichtigsten Metadaten normalisiert nach dem ONIX-3-Standard: Titel, Mitwirkende, Verlag, ISBN, BISAC- und Thema-Codes sowie Schlagwörter.

Metadaten extrahieren

Book Description Writer

Upload a PDF or EPUB and get back-cover copy in three styles — back cover, catalog, and staff pick — written in the language of your book.

Write descriptions

EPUB Accessibility Checker

Check your EPUB files for accessibility issues, WCAG conformance, alt text, language markup, heading structure, ARIA roles, and more.

Check accessibility

Book Quality Checker

A complete pre-publish audit: epubcheck conformance, accessibility, and the Qualebook production checklist in one report.

Run quality check

Ebook-Preisrechner

Erhalten Sie eine datenbasierte Preisempfehlung für Ihr Ebook — basierend auf Genre, Länge, Verlagsstufe, Autoren-Erfolgsbilanz und Zielmarkt.

Preis berechnen

2026 U.S. Marketing Calendar

Über 120 wichtige Termine und Kampagnenideen für die US-Buchbranche. Feiertage, literarische Veranstaltungen, Preisverleihungen, Festivals und mehr.

Kostenlosen Kalender herunterladen

For authors

Tools for indie authors and self-publishers deciding where to sell.

Explore the Authors solution →

Author Royalty Calculator

Compare what you earn per book on Amazon KDP, Apple Books, Kobo, Google Play and a direct-to-consumer storefront — side by side, annual projection.

Calculate earnings

Self-Publishing Readiness Assessment

Eight short questions, a 0-100 readiness score, and three personalized next steps for indie authors deciding between KDP, marketplaces, and direct-to-consumer.

Take the assessment

For publishers

Model revenue and margins for trade and digital-first publishers.

Explore the Publishers solution →

Publisher Revenue Calculator

Estimate how much more revenue a trade or digital-first publisher keeps by adding a direct channel alongside Amazon and retail distribution.

Calculate revenue

For university presses

Tools for academic publishers building a direct-to-consumer channel.

Explore the University Presses solution →

University Press ROI Calculator

Model the impact of shifting university press sales from Amazon and institutional channels to a direct-to-consumer storefront. Keep 85% vs 35%.

Calculate ROI

D2C-Reifegrad-Bewertung

Bewerten Sie die digitale Reife Ihres Universitätsverlags in 5 Schlüsselbereichen. Erhalten Sie einen personalisierten Score, Benchmarks und umsetzbare Empfehlungen.

Bewertung starten

For magazines & newspapers

Model paywall and subscription revenue for editorial brands.

Explore the Magazines solution →

Magazine Paywall Calculator

Project paywall and subscription revenue for magazines and digital newspapers. Test conversion, ARPU and churn scenarios in seconds.

Model paywall revenue

For bookshops

Tools for independent bookshops launching a digital storefront.

Explore the Bookshops solution →

Bookshop Storefront Calculator

See how much more revenue you keep by moving sales from Bookshop.org and affiliate links to your own owned digital storefront.

Calculate margin
Origami by publica.la

Do this for your whole catalog in Origami

Metadata, EPUB and accessibility checks, descriptions and more — all in one place, without the one-off limit. Origami is where these tools live for your entire list.

Start in Origami

Need a custom solution?

Publica.la helps publishers manage, distribute, and sell digital content at scale — with enterprise-grade tools and dedicated support.

Schedule a demo