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ZMakeMyZip
job card · № 17 of 19 · convert

Add Files to ZIP.

Drop an existing ZIP, then drop the files you want to add. Pick a conflict policy and download a merged archive.

routeclient-local
upload0 B
formatsZIP

1. Existing ZIP

Drop the ZIP you want to add to

Select a file

Up to 2 GB per file.

2. Files to add

Drop files or a folder to append

Select one or more files

Up to 2 GB per file.

3. Options

The whole output ZIP is re-compressed at this level, including entries from the original archive.

.zip

4. Build combined ZIP

instructions · step by step

How to use this tool

Append new files or a folder to an existing ZIP and download the combined archive.

  1. Open the Add Files to ZIP tool

    Visit makemyzip.com/add-to-zip. Both the source archive and the new files are read locally.

  2. Drop the existing ZIP

    Drag the ZIP you want to add to onto the first dropzone. Its file index is read so we can detect duplicate paths.

  3. Drop the files to add

    Drag new files or a folder onto the second dropzone. Folder structure is preserved when they land in the output ZIP.

  4. Pick a conflict policy

    Rename adds a numeric suffix on duplicate paths. Overwrite replaces the existing entry with the new file. Skip keeps the original untouched.

  5. Build the combined ZIP

    Click Build combined ZIP. Existing entries are copied, new files are added per the conflict policy, and the result downloads.

questions · from the clerk's desk

Frequently asked questions

Is the original ZIP modified?

No. The original file on your disk is never touched. The tool reads it into memory, builds a new combined archive, and delivers that as a fresh download.

What happens if a new file has the same path as an existing entry?

The conflict policy decides. Rename gives the new file a numeric suffix (file_1.txt, file_2.txt). Overwrite replaces the existing entry. Skip keeps the original and drops the incoming file.

Does it preserve the original compression?

No — the whole output ZIP is re-compressed at the level you pick. Store keeps things fastest; Max gives the smallest output.

Can I add to a password-protected ZIP?

Not in this tool. Decrypt first with Unlock ZIP, add the files here, and if you need encryption again, pass the result through Password Protect ZIP.

3 picks
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Split Archive

Split a large archive into smaller, independently-openable parts.

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