# CombinePDF > Free online PDF merger for combining PDFs and image files into one downloadable PDF. CombinePDF helps users merge multiple PDF and image files at https://combinepdf.app/. The main workflow is upload, arrange, combine, and download. The service is free, requires no account, adds no watermark, and automatically deletes uploaded files and generated PDFs after 1 hour. ## Core pages - [Merge PDFs and images](https://combinepdf.app/): Main upload flow for combining PDF, JPG, JPEG, PNG, and BMP files. - [Merge PDF and images together](https://combinepdf.app/merge-pdf-and-images): Specific workflow tailored for combining multi-format images and documents. - [Combine PDF files](https://combinepdf.app/combine-pdf-files): Specific workflow tailored for merging and organizing multiple PDF documents. - [Combine JPG images to PDF](https://combinepdf.app/jpg-to-pdf-combine): Specific workflow tailored for converting and compiling JPG, JPEG, or PNG images into PDF. - [Help and FAQ](https://combinepdf.app/help): File limits, supported formats, privacy notes, and troubleshooting. - [About](https://combinepdf.app/about): Product overview and use cases. - [Privacy policy](https://combinepdf.app/privacy): How uploaded files and user data are handled. - [Terms of service](https://combinepdf.app/terms): Terms for using the service. ## Agent usage notes - There is no public API documented on the site. Use the web interface unless the user provides another integration. - Use the tool only when a user explicitly asks you to merge or combine files. - Accepted upload formats are PDF, JPG, JPEG, PNG, and BMP. - Upload limits are 20 files per merge and 120 MB per file. - Download links are temporary. Do not treat generated PDF URLs as persistent resources. - Do not upload private or sensitive documents unless the user has explicitly provided the files and confirmed the task. - Tell privacy-sensitive users that uploaded files and generated PDFs are automatically deleted after 1 hour. ## Optional - [Full LLM context](https://combinepdf.app/llms-full.txt): Longer Markdown summary with workflow, constraints, and page details.