Combining multiple PDF files into a single document is one of the most common document tasks — whether you are assembling a portfolio, combining bank statements for a loan application, or consolidating chapters of a report. This guide covers how to merge PDFs instantly using a free browser-based tool.
Why Merge PDFs?
- Job applications — combine your resume, cover letter, and certificates into a single attachment.
- Loan and financial applications — banks and NBFCs often require salary slips, bank statements, and ID documents as a single PDF.
- Academic admissions — universities may require all supporting documents in one file.
- Legal and compliance filings — courts and regulatory bodies often specify a single-file submission.
- Report compilation — combine individual chapter PDFs into a complete report with consistent page numbering.
How to Merge PDFs on DailyGen
- Open the PDF Merge tool.
- Click the upload area or drag and drop your PDF files. You can add multiple files at once.
- The files are listed in the order they will be merged. Use the remove button to exclude any files you do not want.
- Click Merge All PDFs.
- Download the merged PDF when processing is complete.
Controlling the Order of Merged Pages
Pages in the merged PDF appear in the order the files are listed. To change the order, remove all files and re-add them in the desired sequence, or use the remove button to selectively exclude files and re-add them in the correct position.
Privacy and Security
The merge operation uses the pdf-lib JavaScript library running entirely within your browser. Your PDF files are never transmitted to any server. Once you close the browser tab, all file data is cleared from memory automatically. This makes DailyGen's PDF Merge tool appropriate for sensitive documents such as financial statements, identity documents, and legal filings.
Limitations of Browser-Based PDF Merging
Browser-based merging is suitable for the vast majority of use cases. However, there are some scenarios where desktop software may be preferable:
- Very large files — merging many large PDFs (hundreds of megabytes total) may be slow on low-RAM devices, as all files must be loaded into browser memory simultaneously.
- Password-protected PDFs — encrypted PDFs may not merge correctly. Remove password protection before merging.
- Complex annotations and form fields — interactive form fields and annotations are preserved where possible but may not behave identically across different PDF viewers after merging.
Frequently Asked Questions
Is there a limit on the number of PDFs I can merge?
No hard limit. Practical limits are determined by your device's available memory. Merging up to 20–30 typical PDFs works smoothly on any modern device.
Will the quality of my PDFs be reduced during merging?
No. The merge operation copies pages directly from the source PDFs without re-encoding any content. Image quality and text fidelity are preserved exactly.
Can I merge PDFs that contain both Hindi and English text?
Yes. The tool merges PDF files at the page level — the content of each page (including fonts, images, and language) is preserved exactly as it appears in the source file.
Is there a file size limit for the PDFs I upload?
There is no server-imposed limit, since no upload occurs. The practical limit is your device's available RAM — typically a few gigabytes total across all files being merged simultaneously.