Tools
Edit the contents of a ZIP file
Remove files you do not want, give them new names, or add something that is missing. You avoid extracting everything and rebuilding the archive by hand — and it all happens on your own machine.
Choose the archive you want to edit
Your original archive is never changed. You get a new file, and the old one is left untouched.
How it works
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1
Choose the ZIP file. You get a list of everything inside it, with the size of each file.
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2
Untick what you do not want to keep. To rename a file, type straight into the name field. If you need to add something, choose the files at the bottom.
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3
Press «Save as a new archive» and download it. Your original is unchanged the whole way.
The archive is always rewritten
The ZIP format does in principle allow cutting out one entry and patching the table of contents. We do not do that. Every entry points to a place in the file, and if you remove something in the middle, all the following ones have to point somewhere new anyway.
Then it is more honest to build a new archive from scratch. It takes a little longer on large archives, but you get a file that is guaranteed to be whole — not a half-patched one. Your original is never touched along the way.
Two files cannot have the same name
If you give two files the same name, the tool says so immediately and will not let you save until it is fixed. The reason is that an archive with two identical names is technically legal, but when the recipient extracts it, one overwrites the other — without anyone being told.
The same goes for empty names. A file without a name cannot be extracted again in any sensible way.
Password-protected archives
If the archive is locked, a password field appears. We need the password to read the files out, exactly as when you extract an archive.
Note that the new archive is not locked. Creating password-protected archives is not built yet. For now, edited archives come out without protection — it says so here because it is worth knowing before you send the file on.
Questions and answers
Is my original file changed?
No, never. The browser can read the file you choose, but not write back to it. You get a new archive with «-redigert» in the name, and the original stays where it was.
Can I move a file to another folder in the archive?
Yes. The folder structure lives in the file name itself, so if you type «photos/holiday.jpg» in the name field, the file ends up in the folder «photos». Type just «holiday.jpg» and it is placed at the top of the archive.
Are the files compressed again?
Yes, they are unpacked and packed again. That is why the new archive can be slightly larger or smaller than the old one, even if you changed nothing. File types that are already compressed — images, video, other archives — are stored untouched.
Are my files uploaded?
No. Both the reading and the writing happen in your own browser. You can check it yourself in the Network tab of the developer tools — no request goes out while the work is running.
How many files can it handle?
The limit is 20,000 files in the archive. The list naturally becomes unmanageable long before that — if you only need to take out a few files, «Open ZIP file» is faster.