How to Merge Multiple Files Into One PDF (Images, Docs, Spreadsheets — Free)

TL;DR

To merge different file types into one PDF: install Convert: Anything to PDF, click the icon, drag and drop all your files (images, CSV, text, HTML, Markdown), choose your paper size, and click Convert. Everything merges into a single PDF on your device — no upload, no watermarks, no limits.

Why merge files into one PDF?

Combining multiple files into a single PDF is one of the most common document tasks:

• Client deliverables — Combine a cover page image, a data report (CSV), and summary notes into one professional document
• Portfolios — Merge design mockups, screenshots, and project descriptions into a single presentation file
• Applications — Combine multiple documents (ID scan, resume, cover letter) into one PDF for submission
• Reports — Merge charts (images), data tables (CSV), and analysis (text) into one report
• Archiving — Combine related documents from different formats into one searchable file
• Invoicing — Merge multiple receipts and supporting documents into one expense report

The problem with most merge tools

PDF-only merging

Most merge tools only merge existing PDF files. If your files are in different formats — some JPGs, a CSV, a text file — you need to convert each one to PDF first and then merge the PDFs. This adds multiple steps and often requires multiple tools.

Cloud upload requirements

Smallpdf, iLovePDF, and similar tools require you to upload files to their servers. For confidential business documents, client data, or personal files, this is a privacy risk.

Daily limits

Smallpdf counts merging as one of your 2 daily tasks. iLovePDF has similar restrictions. If you have already converted a file today, you may not be able to merge.

Watermarks and account walls

Some free merge tools add watermarks or require account creation. This adds friction to what should be a simple operation.

The solution: multi-format merge in one step

Convert: Anything to PDF combines conversion and merging into a single operation. Drag in files of any supported format and they merge into one PDF.

Supported file types for merging

• Images: JPG, PNG, WebP, SVG, GIF, BMP
• Text files: TXT, HTML, JSON, XML
• Markdown: .md files rendered with proper formatting
• Spreadsheets: CSV files with automatic table formatting
• Web pages: The current browser tab

All of these can be mixed in a single merge operation.

Step-by-step: merge files into one PDF

• Click the Convert: Anything to PDF icon in your toolbar
• Select "Upload Files"
• Drag and drop all the files you want to merge — any mix of supported formats
• Arrange the order by dragging files in the list
• Select paper size (A4, Letter, or Legal) and orientation
• Click Convert
• A single PDF downloads with all files combined in order

How different file types appear in the merged PDF

• Images are placed on their own page, scaled to fit the paper size while maintaining aspect ratio
• CSV files are rendered as formatted tables with headers, borders, and auto-landscape if the data is wide (6 or more columns)
• Text and Markdown files are rendered as formatted text with appropriate headings and structure
• HTML files are rendered as they would appear in a browser
• Multiple images each get their own page, creating a photo portfolio or image collection

Practical examples

Example 1: Client report

Files to merge:

• company-logo.png (header image)
• q1-sales.csv (sales data)
• analysis-notes.md (written analysis)
• team-photo.jpg (team image)

Result: A single PDF with the company logo on the first page, a formatted sales table on the second page, the analysis text on the following pages, and the team photo at the end.

Example 2: Design portfolio

Files to merge:

• mockup-1.png
• mockup-2.png
• mockup-3.jpg
• project-description.txt

Result: A PDF portfolio with each mockup on its own page and the project description as the final page.

Example 3: Expense report

Files to merge:

• receipt-hotel.jpg
• receipt-dinner.png
• receipt-taxi.jpg
• expense-summary.csv

Result: A single PDF with all receipt images followed by a formatted expense summary table.

Tips for best results

Order matters

Files appear in the PDF in the order you add them. Drag to reorder in the file list before converting. Put your most important content first.

Use landscape for wide data

If your CSV has many columns, the extension auto-detects and switches to landscape. For mixed file merges where some content is wide and some is narrow, consider doing two separate merges or using a paper size like A3 that accommodates wider content.

Optimize images before merging

Very large images (10MB or more) still work but produce larger PDFs. If file size matters, resize images before merging.

Name your output file

The default filename is based on the first file in the merge. Rename the downloaded PDF to something descriptive.

Comparison: file merging methods

Convert: Anything to PDF:

• Merge different file types: Yes (images, CSV, text, HTML, Markdown)
• Upload to server: No
• Watermarks: None
• Daily limits: None
• Cost: Free

Smallpdf:

• Merge different file types: No (PDF files only)
• Upload to server: Yes
• Watermarks: None
• Daily limits: 2 tasks per day (free)
• Cost: Free with limits, $12-15/month

iLovePDF:

• Merge different file types: No (PDF files only)
• Upload to server: Yes
• Watermarks: None
• Daily limits: Limited
• Cost: Free with limits, $7-9/month

Manual method (convert each, then merge):

• Merge different file types: Yes (multi-step)
• Upload to server: Depends on tools used
• Watermarks: Depends on tools used
• Daily limits: Depends on tools used
• Cost: Time-intensive

Related reading

• How to Batch Convert Multiple Files to PDF at Once (Free, No Limits) — convert files before merging them
• Create a Job Search Portfolio PDF: Resume, Cover Letters & Work Samples in One File — a practical merge workflow for job seekers
• How to Create a PDF Portfolio From Multiple Images — merge images specifically into a professional portfolio

Frequently asked questions

Can I merge existing PDF files with this tool?

Convert: Anything to PDF is designed for converting non-PDF files to PDF and merging them. For merging existing PDF files, tools like Smallpdf, iLovePDF, or PDF24 handle PDF-to-PDF merging.

Is there a limit on how many files I can merge?

No hard limit. The extension processes files locally, so performance depends on your computer's resources. For typical use (5 to 20 files), there are no issues.

Can I rearrange the order of files?

Yes. After dropping files into the extension, you can drag them to reorder before converting.

Does the merged PDF preserve image quality?

Yes. Images are embedded at their original resolution, scaled to fit the selected paper size. No compression or quality loss is applied.

Bottom line

Merging files into a PDF should be a one-step operation, not a multi-tool workflow. Convert: Anything to PDF lets you drag in any mix of images, CSV, text, HTML, and Markdown files and get a single, clean PDF — instantly, locally, and free.