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Merge PDF Files Online

Combine multiple PDFs into one file instantly

A free online tool to merge PDF files in seconds. Simply drag and drop your PDFs into the tool, arrange them in the order you need, and combine them into a single PDF document instantly.

How to Merge PDF Files in 3 Steps

1. Upload Your PDF Files

Click to select or drag and drop multiple PDF files into the tool.

2. Arrange Your Files

Reorder your PDFs by dragging them into the sequence you need before merging.

3. Merge & Download

Click merge and download your combined PDF instantly in seconds.

Why Use Our PDF Merger Tool?

The easiest way to combine multiple PDF files into one.

⚡

Lightning Fast

Merge multiple PDF files into one in seconds. Upload, arrange, and download without any delays.

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100% Free

No hidden fees, no subscription required. Combine as many PDF files as you need, completely free.

🔒

Privacy First

Your PDFs are processed securely and automatically deleted after 2 hours. Nothing is stored or shared on our servers.

📄

Merge Any PDF

Whether it’s reports, invoices, contracts, or presentations, our tool combines any PDF files cleanly into a single document.

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Full Control Over Order

Drag and rearrange your PDF files in any order before merging, so your final document flows exactly the way you need.

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Works on Any Device

Fully browser-based and works on desktop, tablet, and mobile devices.

Build Document Automation That Scales With APITemplate

APITemplate is an API-first platform that generates professional PDFs and images at scale from reusable templates, raw HTML, or URLs. Integrate via REST API, SDKs, or no-code tools like Zapier, Make, and n8n.

Create Document Templates with Visual Editor

Create stunning PDFs using our  WYSIWYG Template Editor. With its user-friendly interface, you can design templates visually — no coding required.

Combine your designs with JSON data to generate dynamic, fully-customized PDFs tailored to your needs. Perfect for invoices, reports, certificates, and more.

Explore PDF Generation API

Convert HTML to PDF

Convert HTML to PDF using APITemplate.io’s powerful HTML Template Editor. Combine your HTML, CSS, and JavaScript skills with dynamic JSON data to create custom templates that deliver pixel-perfect PDFs.

Our PDF generation solution supports modern web technologies, enabling seamless integration for your automated workflows, reports, and more.

Explore HTML to PDF
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Customer Reviews

Trusted by businesses worldwide to generate millions of PDFs and images reliably.

See what our customers have to say
We are very grateful to Jacky and the team at APITemplate - their software has helped us to auto-generate high quality images for our student reports.

It has been the perfect fit for us as we grow our Oxford summer school.
Jamie Dear
Jamie DearFounder
We've successfully automated YouTube thumbnails and match event creation for our Powerchair Football league using your templates. It integrates with our Postgres database on retool.com, is expanding to include league table graphics and match results.

Thanks to an AWS Inclusion and Diversity grant, we're enhancing our live-streaming workflow, further boosted by your product's automation capabilities.

We're grateful for your excellent service and wanted to share our positive experience.
Alex Dowding
Alex DowdingVice Secretary
At askreferral.io, We are building referral networking platform for people to pitch and generate leads for different kinds of referrals, including, but not limited to job referrals, product referrals, funding referrals, realtor referrals etc.

Having a vibrant social media community is crucial for our growth and APITemplate.io played crucial role in automating generation of digital posters for job postings, profile pitches, funding requests etc, to help us grow from 0 to 200K+ followers in LinkedIn in less than one year.
Nishitha Dhanekula
Nishitha DhanekulaCofounder /CTO
We've been using APITemplate.io to generate social images for our karting races and it's been a huge time-saver. The support team is super responsive and helpful - they quickly resolved an issue we encountered. We highly recommend this tool to anyone who needs a similar solution.
Danaé Nicolas
Danaé NicolasCTO
APITemplate.io is such an easy application to use. Simple, intuititive, and code free. At simplehuman, we render all our commercial invoices, dispatch notes, and multiple other templates. The ability to create multiple layouts, and group them into a logical container - makes our lives much simpler.

This is a great tool to use, both affordable, and the support service turnaround time is second to none!

Defintely worth the subscription!
Ryan Turnbull
Ryan TurnbullIT Manager
Had an issue with template implementation via Make and reached out for support. Within minutes, I got a response and was soon on a Zoom call resolving it.

Despite the issue not being directly related to APITemplate.io, their team efficiently guided me to the right formatting. Many thanks!
Ron P.
Ron P.Product Manager
We have been using the service daily in our application for a year and are very satisfied with the reliability.

It meets all our requirements and requests for changes/improvements can be discussed directly with Jacky 1:1.

Thanks and greetings from Germany
Nicholas Gertz
Nicholas GertzProduct Owner
We use APITemplate to generate key documentation we need to work with our industry partners.

We are building a digital solution in an antiquated industry, which means we need to communicate data to our partners in the format that they are accustomed to (pdf forms).

APITempate makes it easy for us to do this!
Lucas Fridman
Lucas Fridman Chief Product Officer
We love APITemplate.io for its simplicity and ease of use. Just setup once and "forget" about it due to its fabulous 3rd party integration.

New features are regularly added, and reasonable custom requests are honoured within days.
Jean-Paul Horn
Jean-Paul HornPublisher
APITemplate.io is one of the best services I have worked with in a very, very long time. They are super responsive and a joy to work with.

If you are struggling with PDF's, like I was, check 'em out!
Kevin Frickē
Kevin Frickē
We run conferences with a number of speakers, each requiring an individual speaker profile. We used to create all of these profiles manually, but by incorporating APItemplate into our Zapier workflow, our team can generate a complete image with all of the speakers information in one click.

Using the template editor is a bit of a learning curve, but the support team is very responsive and helpful.
Jacob Monash
Jacob MonashAutomation Specialist
APITemplate.io is great. I love being able to quickly use HTML and CSS templates with dynamic variables to create documents.

Support is also fast and responsive.

Great vendor!
George Cooper
George Cooper-
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Frequently asked questions

What is a PDF merger tool?

A PDF merger tool is a free online tool that lets you combine multiple PDF files into a single document directly in your browser. Simply upload your PDFs, arrange them in the order you need, and let you download the merged file.

How many PDF files can I merge at once?

You can upload and combine multiple PDF files in one go. Simply drag and drop all the files you want to merge into the tool and they will be combined into one single PDF document.

Will merging PDFs affect the quality or formatting?

No. Our tool combines your PDF files without affecting the original formatting, layout, fonts, or image quality of any of the documents.

Can I choose the order of pages when merging PDFs?

Yes. You can drag and rearrange your uploaded PDF files in any order before merging so your final document is structured exactly the way you need it.

Is it safe to upload my PDF files to merge them? 

Yes. Your PDFs are processed securely and automatically deleted after 2 hours. Nothing is stored or shared on our servers.

Can I split a merged PDF back into separate files? 

Yes. If you need to separate pages from a combined PDF, use our free Split PDF tool to divide it back into individual files.

Can I add page numbers to my merged PDF? 

Yes. Once you’ve merged your PDFs, use our free Add Page Numbers to PDF tool to add consistent page numbering across your final document.

Can I also compress my merged PDF to reduce file size? 

Yes. After merging, if your file is too large to share, use our free Compress PDF tool to reduce the file size without losing quality.

 

What is APITemplate.io?

APITemplate.io is designed for generating PDF documents from reusable templates. It can be easily integrated with popular tools like Zapier, Airtable, Make.com, Bubble.io, n8n, UiPath, or directly via REST API, making it highly adaptable to various workflows.

There are three main ways to generate PDF documents using APITemplate.io:

  1. Template-based PDF generation: Create PDFs from predefined templates.
  2. HTML to PDF generation: Convert HTML content directly into PDF format.
  3. URL to PDF generation: Convert entire web pages to PDFs by simply providing their URLs.

 

The platform also supports custom CSS and JavaScript, allowing for advanced styling and customization. Its powerful template engine ensures that you can create complex documents efficiently, while the API Console enables you to preview and customize JSON data instantly.

In addition, APITemplate.io offers support for adding custom headers and footers, including page numbers and total page counts, making it an excellent choice for creating polished, professional PDF documents.

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