Konverter e-bøger til EPUB API - Professionel EPUB 3.0-generering

Generer gyldige EPUB 3.0 e-bøger fra struktureret indhold med forsider, indholdsfortegnelse, flersproget understøttelse og 7 skabeloner. Samme inputformat som PDF API — øjeblikkelig generering.

Hvad kan du gøre?
Gyldigt EPUB 3.0-output

Generer ombrydelige EPUB e-bøger med korrekte OPF-metadata, NCX-indholdsfortegnelse, XHTML-kapitler og indlejrede forsidebilleder. Kompatibel med alle større e-bogslæsere.

7 professionelle skabeloner

Vælg mellem Moderne Roman, Elegant Roman, Akademisk Afhandling, Forretningsrapport, Kogebog, Rejseguide eller Teknisk Manual — hver med unik styling.

21+ sprog

Automatisk oversatte indholdsfortegnelse-overskrifter, kapitelnumre og copyrighttekst. Fra engelsk til bulgarsk, tysk, japansk, arabisk og mere.

99.9 % Oppetid
Svar
20 req/s
2 Kreditter / forespørgsel

Convert to EPUB

POST https://api.yeb.to/v1/ebooks/epub/convert-from-file
Parameter Type Påkrævet Beskrivelse
api_key string Yes Your API authentication key (send in Authorization header or as parameter)
file_url string Yes Public URL to JSON file containing book data (metadata, chapters, options)
Same input as PDF API. Use the exact same JSON structure as the Ebooks to PDF API. Simply change the endpoint URL to get EPUB output instead of PDF.

JSON File Structure

Your JSON file at file_url should contain:

Parameter Type Påkrævet Beskrivelse
template string Yes Template name: modern-novel, elegant-novel, academic-paper, business-report, cookbook, travel-guide, technical-manual
metadata object Yes Book metadata (title, author, etc.)
metadata.title string Yes Book title
metadata.author string Yes Author name
metadata.language string Optional Language code (e.g., en, bg, de). Affects TOC heading, chapter numbering, copyright text. Default: en. Supports 21+ languages.
metadata.description string Optional Book description (embedded in EPUB metadata)
metadata.year integer Optional Publication year (default: current year)
metadata.publisher string Optional Publisher name
metadata.isbn string Optional ISBN number (added as dc:identifier in OPF)
metadata.subtitle string Optional Book subtitle (shown on title page)
metadata.series string Optional Book series name (shown on title page)
metadata.cover_image string Optional Cover image URL (downloaded and embedded in EPUB)
chapters array Yes Array of chapter objects (max: 100)
chapters[].title string Yes Chapter title
chapters[].subtitle string Optional Chapter subtitle
chapters[].content string Yes Chapter content (plain text or HTML). Paragraphs separated by \n\n are auto-wrapped in <p> tags.
options object Optional Customization options
options.include_cover boolean Optional Include cover page if cover_image provided (default: true)
options.include_copyright boolean Optional Include copyright page (default: true)
options.font_size string Optional Base font size, e.g., 12pt (default: 12pt)
options.line_height string Optional Line height, e.g., 1.6 (default: 1.6)
texts object Optional Override auto-translated texts (copyright_text, publisher_text, chapter_number_format, toc_title, etc.)

JSON File Example

1. Create book.json on your server:
{
  "template": "elegant-novel",
  "metadata": {
    "title": "The Great Gatsby",
    "author": "F. Scott Fitzgerald",
    "subtitle": "A Novel of the Jazz Age",
    "description": "A story of decadence and excess...",
    "year": 1925,
    "publisher": "Charles Scribner's Sons",
    "isbn": "978-0-7432-7356-5",
    "language": "en",
    "cover_image": "https://example.com/gatsby-cover.jpg"
  },
  "chapters": [
    {
      "title": "Chapter I",
      "content": "In my younger and more vulnerable years...\n\nAnd, after boasting this way..."
    },
    {
      "title": "Chapter II",
      "content": "About half way between West Egg and New York..."
    }
  ],
  "options": {
    "font_size": "12pt",
    "line_height": "1.6",
    "include_copyright": true
  }
}
2. Upload to your server (e.g., https://yourdomain.com/books/book.json)
3. Call the API:

Integration Examples

curl -X POST https://api.yeb.to/v1/ebooks/epub/convert-from-file \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"file_url": "https://yourdomain.com/books/book.json"}'
const response = await fetch('https://api.yeb.to/v1/ebooks/epub/convert-from-file', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    file_url: 'https://yourdomain.com/books/book.json'
  })
});
const result = await response.json();
console.log(result.epub_url);
$response = Http::withHeaders([
    'Authorization' => 'Bearer YOUR_API_KEY'
])->post('https://api.yeb.to/v1/ebooks/epub/convert-from-file', [
    'file_url' => 'https://yourdomain.com/books/book.json'
]);
$epub_url = $response->json()['epub_url'];
import requests

headers = {
    "Authorization": "Bearer YOUR_API_KEY",
    "Content-Type": "application/json"
}
payload = {
    "file_url": "https://yourdomain.com/books/book.json"
}
r = requests.post('https://api.yeb.to/v1/ebooks/epub/convert-from-file', json=payload, headers=headers)
print(r.json()['epub_url'])

Response Examples

{
  "success": true,
  "epub_url": "https://yeb.to/storage/ebooks/epub/epub_abc123.epub",
  "epub_size": 5772,
  "template": "elegant-novel",
  "chapters": 3,
  "generated_at": "2026-02-18T14:30:00+02:00",
  "response_code": 200,
  "response_time_ms": 12
}
{
  "error": "Metadata field 'title' is required",
  "response_code": 400,
  "response_time_ms": 5
}

Svarkoder

KodeBeskrivelse
200 SuccessForespørgsel behandlet OK.
400 Bad RequestInputvalidering mislykkedes.
401 UnauthorizedManglende / forkert API-nøgle.
403 ForbiddenNøgle inaktiv eller ikke tilladt.
429 Rate LimitFor mange forespørgsler.
500 Server ErrorUventet fejl.
EPUB 3.0 Standard

Generated EPUBs are fully compliant with the EPUB 3.0 specification:

  • Valid OPF package document with dc:metadata
  • NCX table of contents (EPUB 2 compat)
  • EPUB 3 navigation document (nav.xhtml)
  • XHTML chapters with template-based CSS
  • Embedded cover image (JPG, PNG, WebP)
  • Title page, copyright page, TOC
  • 21+ languages auto-translated
Same Input as PDF

Use the exact same JSON data for both PDF and EPUB generation. Simply switch the endpoint URL to get your preferred output format.

Convert to EPUB

ebooks/epub/convert-from-file 2.0000 credits

Parameters

API Key
body · string · required
File URL
body · string · required

Code Samples


                
                
                
            

Response

Status:
Headers

                
Body

                

List Templates

POST https://api.yeb.to/v1/ebooks/epub/templates
Parameter Type Påkrævet Beskrivelse
api_key string Yes Your API authentication key
Free endpoint! This endpoint costs 0 credits. Use it to discover available templates before generating.

Available Templates

Modern Novel

Clean, contemporary design. Drop-cap first letters, elegant typography.

modern-novel
Fiction, novels, short stories
Elegant Novel

Classic serif design with italic chapter titles and borders.

elegant-novel
Fiction, novels, multilingual
Academic Paper

Professional layout with bold headings and clear structure.

academic-paper
Research, academic, thesis
Business Report

Sans-serif corporate design with accent borders.

business-report
Business, reports, proposals
Cookbook

Recipe-friendly layout with warm colors.

cookbook
Recipes, cooking, food
Travel Guide

Compact sans-serif design with green accents.

travel-guide
Travel, guides, tourism
Technical Manual

Structured layout with shaded headers and monospace numbers.

technical-manual
Documentation, technical, manuals

Response Example

{
  "success": true,
  "templates": [
    {
      "slug": "modern-novel",
      "name": "Modern Novel",
      "description": "Clean, contemporary design...",
      "best_for": ["fiction", "novels", "short-stories"]
    },
    {
      "slug": "elegant-novel",
      "name": "Elegant Novel",
      "description": "Fully customizable elegant design...",
      "best_for": ["fiction", "novels", "multilingual"]
    }
  ],
  "total": 7,
  "response_code": 200,
  "response_time_ms": 8
}

Svarkoder

KodeBeskrivelse
200 SuccessForespørgsel behandlet OK.
400 Bad RequestInputvalidering mislykkedes.
401 UnauthorizedManglende / forkert API-nøgle.
403 ForbiddenNøgle inaktiv eller ikke tilladt.
429 Rate LimitFor mange forespørgsler.
500 Server ErrorUventet fejl.

List Templates

ebooks/epub/templates 0.0000 credits

Parameters

API Key
body · string · required

Code Samples


                
                
                
            

Response

Status:
Headers

                
Body

                

Konverter e-bøger til EPUB API - Professionel EPUB 3.0-generering — Practical Guide

A hands-on guide to generating EPUB 3.0 ebooks from structured content: metadata, chapters, and templates. Same input format as the PDF API — just switch the endpoint to get reflowable EPUB output.

#What this API does

Send structured book content (metadata + chapters) and receive a valid EPUB 3.0 file with automatic table of contents, cover page, copyright page, and template-based styling. The output is reflowable — readers can adjust font size and layout on any device. Supports 21+ languages with auto-translated section headings.

Same input as PDF API. If you already use the Ebooks to PDF API, you can use the exact same JSON — just change the endpoint URL to get EPUB output instead.

#Endpoint

#POST https://api.yeb.to/v1/ebooks/epub/convert-from-file

  • Best for: Converting novels, articles, manuals, or any multi-chapter content into EPUB ebooks.
  • How it works: Pure PHP generation via ZipArchive — no external tools needed. XHTML chapters, OPF metadata, NCX + nav.xhtml TOC.
  • Output format: Valid EPUB 3.0 with NCX fallback for EPUB 2 readers.
  • Processing time: ~5-50ms depending on chapter count and cover image download.

#Quick start

Step 1: Create a JSON file with your book data:

{
  "template": "elegant-novel",
  "metadata": {
    "title": "My Book",
    "author": "Jane Doe",
    "language": "en",
    "description": "A wonderful story.",
    "cover_image": "https://example.com/cover.jpg"
  },
  "chapters": [
    {
      "title": "Chapter 1",
      "subtitle": "The Beginning",
      "content": "It was a dark and stormy night...\n\nThe wind howled through the trees."
    },
    {
      "title": "Chapter 2",
      "content": "The next morning brought sunshine and hope."
    }
  ]
}

Step 2: Upload to your server and call the API:

curl -X POST https://api.yeb.to/v1/ebooks/epub/convert-from-file \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"file_url": "https://yourdomain.com/book.json"}'

Step 3: Download the EPUB from the returned URL:

{
  "success": true,
  "epub_url": "https://yeb.to/storage/ebooks/epub/epub_abc123.epub",
  "epub_size": 5772,
  "template": "elegant-novel",
  "chapters": 2
}

#Available templates

TemplateStyleBest for
modern-novelSerif, drop-cap first letters, contemporaryFiction, novels, short stories
elegant-novelPalatino serif, italic chapters, bordered headingsFiction, novels, multilingual
academic-paperTimes, bold headings, left-aligned, cleanResearch, academic, thesis
business-reportSans-serif, blue accent borders, corporateReports, proposals, white papers
cookbookSerif, warm red accents, recipe-friendlyRecipes, cooking, food
travel-guideVerdana, green accents, compactTravel guides, tourism
technical-manualSans-serif, shaded headers, monospace numbersDocumentation, manuals

#Multilingual support

Set metadata.language to a 2-letter ISO code and the EPUB will automatically use translated text for section headings:

  • Table of Contents heading (e.g., "Съдържание" for Bulgarian)
  • Chapter numbering format (e.g., "Глава {n}" for Bulgarian)
  • Copyright text (e.g., "© {year} {author}. Всички права запазени.")

Supported: en, bg, de, fr, es, it, pt, ru, uk, pl, nl, tr, ja, zh, ko, ar, cs, ro, el, sr, hr.

#Generated EPUB structure

book.epub (ZIP archive)
├── mimetype                     # "application/epub+zip" (uncompressed)
├── META-INF/
│   └── container.xml            # Points to content.opf
└── OEBPS/
    ├── content.opf              # Package document (metadata + manifest + spine)
    ├── toc.ncx                  # NCX table of contents (EPUB 2 compat)
    ├── nav.xhtml                # EPUB 3 navigation document
    ├── style.css                # Template-based stylesheet
    ├── cover.xhtml              # Cover page (if cover_image provided)
    ├── titlepage.xhtml          # Title page
    ├── copyright.xhtml          # Copyright page
    ├── chapter_001.xhtml        # Chapter 1
    ├── chapter_002.xhtml        # Chapter 2
    ├── ...
    └── images/
        └── cover.jpg            # Embedded cover image

#When to use EPUB vs PDF

FeatureEPUBPDF
Reflowable text Yes Fixed layout
Reader font control Yes No
E-ink devices (Kindle) Ideal Usable
Print-ready No Yes
Fixed page numbers No Yes
Generation speed~5-50ms~2-5 seconds
File sizeSmall (5-50KB)Larger (500KB-5MB)

Ofte stillede spørgsmål

Vi genererer EPUB 3.0-filer med NCX-fallback til EPUB 2-læsere. Outputtet er kompatibelt med Apple Books, Calibre, Kobo, Google Play Books og alle større e-bogslæsere.

Ja! EPUB API'et accepterer præcis samme JSON-struktur (metadata, kapitler, skabelon, muligheder) som E-bøger til PDF API'et. Skift blot endpoint-URL'en for at få EPUB i stedet for PDF.

Syv skabeloner: Moderne Roman, Elegant Roman, Akademisk Afhandling, Forretningsrapport, Kogebog, Rejseguide og Teknisk Manual. Hver giver unik CSS-styling optimeret til e-bogslæsere.

Sæt metadata.language til en af 21+ ISO-koder (en, bg, de, fr, es, it, pt, ru, uk, pl, nl, tr, ja, zh, ko, ar, cs, ro, el, sr, hr). Sektionsoverskrifter, kapitelnumre og copyrighttekst oversættes automatisk.

Ja. Sæt metadata.cover_image til en offentlig URL (JPG, PNG, WebP). Billedet downloades og indlejres direkte i EPUB-filen som forsiden.

Hver EPUB-generering koster 2 credits. Skabelon-endpointet er gratis (0 credits). Credits kan købes i pakker fra 10 USD.

EPUB-generering er ekstremt hurtig — typisk 5-50ms for bøger med op til 100 kapitler. Ingen eksterne værktøjer eller containere nødvendige; alt er bygget i ren PHP.

Genererede EPUB-filer opbevares i 30 dage og slettes derefter automatisk. Download din fil hurtigt eller gem den på din egen CDN.

Ja. Hver forespørgsel, selv dem der resulterer i fejl, forbruger kreditter. Dine kreditter er bundet til antallet af forespørgsler, uanset succes eller fejl. Hvis fejlen tydeligt skyldes et platformproblem på vores side, gendanner vi de berørte kreditter (ingen kontant refusion).

Kontakt os på [email protected]. Vi tager feedback alvorligt—hvis din fejlrapport eller funktionsanmodning er meningsfuld, kan vi rette eller forbedre API'et hurtigt og give dig 50 gratis kreditter som tak.

Det afhænger af API'et og nogle gange endda af endpointet. Nogle endpoints bruger data fra eksterne kilder, som kan have strengere grænser. Vi håndhæver også grænser for at forhindre misbrug og holde vores platform stabil. Se dokumentationen for den specifikke hastighedsgrænse for hvert endpoint.

Vi opererer med et kreditsystem. Kreditter er forudbetalte, ikke-refunderbare enheder, du bruger på API-kald og værktøjer. Kreditter forbruges FIFO (ældste først) og er gyldige i 12 måneder fra købsdatoen. Dashboardet viser hver købsdato og dens udløb.

Ja. Alle købte kreditter (inklusive brøkdele) er gyldige i 12 måneder fra købet. Ubrugte kreditter udløber automatisk og slettes permanent ved udgangen af gyldighedsperioden. Udløbne kreditter kan ikke gendannes eller konverteres til kontanter eller anden værdi. Overgangsregel: kreditter købt før 22. sep. 2025 behandles som købt den 22. sep. 2025 og udløber den 22. sep. 2026 (medmindre en tidligere udløbsdato var angivet ved købet).

Ja—inden for deres gyldighedsperiode. Ubrugte kreditter forbliver tilgængelige og overføres fra måned til måned, indtil de udløber 12 måneder efter købet.

Kreditter er ikke-refunderbare. Køb kun det, du har brug for—du kan altid fylde op senere. Hvis en platformfejl forårsager en mislykket opkrævning, kan vi gendanne de berørte kreditter efter undersøgelse. Ingen kontant refusion.

Priser er angivet i kreditter, ikke dollars. Hvert endpoint har sin egen pris—se mærket "Kreditter / forespørgsel" ovenfor. Du ved altid præcis, hvad du bruger.
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