Merge PDF
Combine at least two unencrypted PDFs into a single document.
Enable JavaScript to select files and convert them on your device.
Merge PDF
Convert images, PDFs and data. No account. Your files stay on your device.
THE TOOLBOX
Small tools. Everyday possibilities.
Useful tools for your everyday files.
Image converter
Convert images to JPG, PNG or WebP.
Image compressor
Compress images on your device.
Image resizer
Resize images while preserving aspect ratio.
Images to PDF
Combine images into a PDF.
Merge PDF
Combine PDFs in your chosen order.
Split & extract PDF
Extract selected pages or split each page.
Rotate PDF
Rotate selected PDF pages clockwise.
Table converter
Convert CSV, TSV and flat JSON tables.
JSON formatter
Validate, format or minify JSON.
Text encoding
Encode and decode Unicode text with Base64 or URL encoding.
How does Merge PDF work?
Combine at least two unencrypted PDFs into a single document. The file list determines the output order, so move files up or down before converting. For example, put a cover PDF first and a report PDF second. The tool copies pages into a new PDF in your browser. Check page count and ordering after download. Digital signatures, form behavior, bookmarks and other interactive features may not survive page copying; retain the original documents.
How do I convert a file without uploading it?
Choose a tool, add a file with the picker or drag and drop, adjust the output settings, then select Convert files and download the result. The conversion code runs in your browser and does not send selected files or entered conversion text to a conversion server. Results stay in page memory until downloaded. Refreshing or closing the page clears that state, so save your results first and retain your originals until you have checked them.
What are the file and device limits?
A batch supports up to 20 files, 50 MiB per file and 150 MiB in total. Image decoding is limited to 40 megapixels. PDF splitting and rotation take one input PDF at a time; splitting into individual files supports up to 500 outputs. Large decoded images and PDFs may need substantially more memory than their file size. Try fewer files if your device struggles. Current browser decoding and device memory determine whether a particular file can be processed.
How can I check the conversion result?
Open the downloaded result and compare it with your original before relying on it. For images, inspect dimensions, transparency and visual quality. For PDFs, check page count, page order and orientation; interactive features and signatures may not be retained. For tables, check headers, row counts and data types: CSV and TSV values become JSON strings, and potential spreadsheet formulas receive an apostrophe prefix on export. Base64 is reversible encoding, so it does not protect secret information.
Read the step-by-step conversion guide · Privacy and analytics
Technical references
- PDF-LIB documentation: The bundled library used to create and copy PDF pages.
Maintained by newcb23 · Content updated · Contact & feedback