ZIP File Creator

What this does

Bundle multiple files into one .zip — works on any computer, opens in any OS.

Drop files in, set a custom archive name, and download a single ZIP. Runs in your browser, so it works on Chromebooks and locked-down corporate laptops where you can't install software. Every modern OS (Windows, macOS, iOS, Android, Linux, ChromeOS) opens ZIP natively.

How to create a ZIP file

1. 1

   Add files

   Drop or browse to add any combination of files — documents, images, videos, code. No file count limit, individual files can be hundreds of MB. They all stay on your device.

2. 2

   Name the archive

   By default the archive is named after the date. Override it with something descriptive like "client-handoff-2026-05" so the recipient knows what they're opening.

3. 3

   Generate and download

   Hit the create button. The ZIP builds in seconds (large file sets may take 10–30 seconds in browser) and downloads as one file ready to attach, upload, or share.

When you'd create a ZIP

How this compares to other ZIP creators

Feature	BBulkShare	BBuilt-in OS (Windows/Mac)	WinZip / WinRAR	ezyZip	Archive.org
Runs in browser only	Yes	N/A (native)	No	Yes	No
Files uploaded to server	Never	N/A	Never	Optional	Yes
Works on Chromebook / locked workstation	Yes	Yes (built-in)	No	Yes	Yes
Custom archive name	Yes	After save	Yes	Yes	Yes
Password protection	No	Mac only via Terminal	Yes	Yes	No
Multi-format (ZIP, 7z, TAR)	ZIP only	ZIP only	All formats	Multi-format	ZIP only
Account required	No	No	Trial then paid	No	No
File-size cap	Browser memory (~4 GB)	OS limits only	OS limits only	2 GB	100 MB

What compresses well — and what doesn't

ZIP uses the DEFLATE algorithm. It works wonders on text and code, almost nothing on images and video.

• .txt, .csv, .json, .xml

  Best for: Massive compression — often 70–90% smaller

• .doc, .docx, .xls, .xlsx

  Best for: Already lightly compressed inside the format; expect 5–15% extra savings

  Watch out: Old .doc/.xls files compress better than modern .docx/.xlsx

• .pdf

  Best for: Minimal compression — PDFs already use internal compression

  Watch out: Use a PDF compressor first if size matters

• .jpg, .png, .gif, .heic

  Best for: Almost no compression — these formats are already optimized

  Watch out: ZIP just bundles them; size barely changes

• .mp4, .mov, .webm

  Best for: Zero compression — modern video codecs are already maxed out

  Watch out: Use a video compressor first, not ZIP

• Source code & web assets

  Best for: 50–80% smaller — text-heavy files love DEFLATE

• .log files

  Best for: Up to 95% smaller for repetitive log lines

Tips for cleaner ZIPs

1. 01

   Don't zip already-zipped formats

   JPG, MP4, PDF, DOCX, and ZIP itself are all internally compressed. Zipping them adds overhead but no size reduction. Bundle them in a ZIP for organization, not space-saving.

2. 02

   macOS adds hidden files Windows users see

   When you zip on macOS, Finder includes .DS_Store and __MACOSX folders. Windows recipients see these as clutter. Strip them by using our tool (which doesn't add them) or running "zip -r archive.zip folder/ -x '*.DS_Store' -x '__MACOSX'" in Terminal.

3. 03

   For really large archives, split before sharing

   Files over 4 GB hit browser memory limits. Split into multiple ZIPs by topic (photos.zip, docs.zip, etc.), or use a desktop tool with multi-volume support (WinRAR's split-by-size).

4. 04

   Pick descriptive names — "archive.zip" is unhelpful

   Two months later, you'll have ten files named "archive.zip" or "download.zip." Name them like client-acme-rebrand-2026-04.zip — searchable, sortable, no guessing.

5. 05

   ZIP doesn't protect against malware

   Antivirus tools scan inside ZIPs nowadays. ZIP isn't a way to bypass corporate email filters. Password-protected ZIPs aren't really safe either — old ZIP encryption is trivially crackable.