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PDFs

Merge PDF

Merge multiple PDF files into a single document.

Accepted

PDF

Limit

1 file · up to 10 MB

Result

PDFs → PDF

Handling

Auto cleanup after 2h

Files auto-deleted
Secure processing
Works in your browser

Upload your PDF

or

Max file size: 10MB

Max files per run: 1

Supported formats: depends on the tool

Upload two or more PDF files, up to 10MB per file. Files will be merged in the order shown.

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Advanced options

Saved tool settings

Save your current settings and apply them with one click.

Pipeline Builder

Build a multi-step flow (compress, convert, resize, merge) and run it in one upload.

Saved presets

Sign in to save and reuse pipeline presets.

Document data

Keep the first PDF as the document shell so its metadata, outlines, and page labels survive when possible.

Delivery

Linearized PDFs open faster in browsers and feel better when shared as links.

Balanced keeps defaults, Smaller pushes harder on stream/object compression, Print stays conservative for compatibility.

Files are uploaded and processed in the background. Results appear in seconds.

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Input summary

PDF compression summary

Original size

Compressed size

Reduced by

Pages

Success! Your PDF pages were converted successfully.

Download your JPG images now or save them to your workspace.

Success! Your PDFs were merged successfully.

Download your merged PDF now or save it to your workspace.

Success! Your PDF was split successfully.

Download your extracted pages now or save them to your workspace.

Success! Your JPG images were combined into a PDF. Success! Your PDF is ready.

Download your output now or save it to your workspace.

CSV processing summary

Input rows

Output rows

Output files

Rows removed

Output size

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How it works

1

Upload your PDFs

Select two or more PDF files. Use Pro to upload larger batches.

2

We merge them in order

Files are combined in the order you uploaded them into a single PDF document.

3

Download the merged PDF

Get a single PDF containing all pages from every file you uploaded.

Read the Merge PDF workflow

🔗 Related PDF tools 4 related tools

About Merge PDF

Assembling a single PDF from multiple files is a common step in document workflows: combining a cover page with a report body, merging signed form pages returned separately, or packaging multiple invoices into one archive for a client. The CodeStorms Merge PDF tool combines any number of PDF files into a single document in the order they are uploaded. No re-encoding is applied — pages from each input are extracted and placed directly into the output, preserving original quality, fonts, and embedded content. It is u...

→ Combine a cover letter, CV, and portfolio pages into one PDF for a job application. → Merge multiple signed contract pages returned separately by different signatories. → Assemble a monthly report from individual section PDFs exported by different team members. → Package multiple invoices into a single PDF before attaching them to an accounting record.

Related guides and workflows

📦 Supported formats 1 file types

PDF

❓ Frequently asked questions 4 answers

Free plan supports merging up to 5 files at once. Pro removes this limit.

Yes. Pages appear in the merged PDF in exactly the order you uploaded the files.

No. The merge keeps the original quality of each page. If you want to reduce file size, run the merged PDF through our PDF Compressor afterwards.

Currently, password-protected PDFs must be unlocked before merging. Use PDF utilities that handle decryption first.