Add Files to ZIP

Drop a ZIP plus the files to add, and get an updated archive without unzipping anything on your computer.

Private by design. Your files are processed on this device and never uploaded. No account, no watermark, no limits.

How to use Add Files to ZIP

  1. Drop the existing .zip and the files to add, together
  2. Choose a folder inside the ZIP (optional) and what to do with name clashes
  3. Click Update ZIP and download

About this tool

The first ZIP you drop is the archive to update; every other file is added to it. Files with the same name are replaced or kept as numbered copies, depending on your choice.

Frequently asked questions

Which file is treated as the archive?

The first .zip file in the list. Any other files (including other ZIPs) are added into it.

Can I remove files from a ZIP?

Open it with Extract ZIP, then create a new ZIP with only the files you want.

Is the original ZIP changed?

No. You download a new, updated archive.

Are my files uploaded to a server?

No. ConvertBrightly processes files with JavaScript inside your browser. Nothing is sent over the network, and the files disappear when you close the tab. You can even disconnect from the internet after the page loads.

Related tools

Create ZIPExtract ZIPGZIP Compress & DecompressMerge PDFCSV to ExcelExcel to CSVExcel to PDFTXT to PDF

Updated · Built by the ConvertBrightly team · How our tools work · Report a problem