ZIP Splitter
Split large ZIP archives into smaller parts online for free — no software needed. Our zip splitter lets you choose a maximum part size (from 1 KB to hundreds of MB), then generates multiple independently extractable ZIP files instantly. Runs entirely in your browser, so your files never leave your device. No signup required.
Why Use Our ZIP Splitter?
Instant ZIP Splitting
Our zip splitter processes your archive instantly in the browser using JSZip — no server round-trips, no wait time. Split large ZIP files into smaller parts within seconds, with configurable size limits from 1 KB to hundreds of MB.
Secure ZIP Splitter Online
Your ZIP archive never leaves your device. Our zip splitter online runs entirely client-side in JavaScript — no file is ever uploaded to any server. Safely split ZIP files containing sensitive source code, documents, or private data.
ZIP Splitter Online — No Installation
Use our zip splitter directly in any modern browser — Chrome, Firefox, Safari, or Edge. No software to install, no plugins, no extensions. Works on desktop, tablet, and mobile with zero setup required.
100% Free Forever
Use our zip splitter completely free with no hidden costs, no signup, no ads, and no usage limits. Split ZIP files online as many times as you need — for personal projects, professional work, or enterprise use. Free forever.
Common Use Cases for ZIP Splitter
Email Attachment Limits
Split large ZIP archives to fit within email attachment limits — Gmail (25 MB), Outlook (20 MB), and Yahoo (25 MB). Use our zip splitter to divide a large archive into email-safe parts and send them sequentially.
Cloud Storage Upload Limits
Split ZIP files to work around per-file upload limits on cloud storage platforms, CMS systems, and web portals. Our zip splitter online creates parts that fit within any platform's maximum file size restriction.
Server & FTP Upload Restrictions
Many web servers, FTP hosts, and shared hosting panels enforce per-file upload size limits. Use our zip splitter to divide large deployment packages or backup archives into server-compatible parts.
Client File Delivery
Deliver large project archives to clients who have strict inbox or portal size limits. Our zip splitter creates clearly numbered parts (part01-of03, part02-of03) so recipients can easily reassemble the files.
CI/CD Artifact Size Limits
Split large build artifacts or release archives to comply with CI/CD pipeline artifact size limits on GitHub Actions, GitLab CI, or Jenkins. Our zip splitter helps you stay within platform constraints.
Mobile & Slow Connection Transfers
Split large ZIP archives into smaller parts for easier transfer over slow mobile connections or unreliable networks — smaller parts are faster to upload, easier to resume, and less likely to time out.
Understanding ZIP Splitting
What is a ZIP Splitter?
A ZIP splitter is a tool that divides a large ZIP archive into multiple smaller ZIP files, each under a configurable maximum size. This is useful when you need to send a large archive via email, upload it to a platform with file size limits, or transfer it over a slow connection. Our free zip splitter online uses JSZip to read the original archive, distribute its files across multiple parts using a greedy bin-packing algorithm, and generate each part as a fully valid, independently extractable ZIP file — entirely in your browser with no server upload required.
How Our ZIP Splitter Works
- Upload Your ZIP Archive: Drag and drop your .zip file onto the drop zone or click to browse. Our zip splitter onlineaccepts any standard ZIP archive up to your browser's memory limit.
- Choose Your Part Size: Select a maximum part size from the presets (1 MB, 5 MB, 10 MB, 25 MB, 50 MB, 100 MB) or enter a custom value in KB or MB. The zip splitter will create as many parts as needed to keep each part under your chosen limit.
- Download Your Parts:Click "Split ZIP" and the tool generates all parts instantly. Download each part individually or click "Download All Parts" to get them all. Parts are named clearly (e.g.,
archive-part01-of03.zip) for easy reassembly.
What Gets Split
- All File Types: Our zip splitter handles any file type inside the archive — source code, images, documents, binaries, and more. All files are preserved exactly as they were in the original archive.
- Directory Structure: Folder paths and directory hierarchy are fully preserved in each part, so files can be extracted to the correct locations after reassembly.
- Greedy Bin-Packing: Files are distributed across parts in alphabetical order using a greedy algorithm — each part is filled until the next file would exceed the size limit, then a new part starts.
- Independent Parts: Each output part is a fully valid, standalone ZIP archive that can be extracted independently — no special reassembly tool required. Recipients can extract each part separately.
Important Limitations
Our zip splittersplits at the file level — individual files cannot be split across parts. If a single file inside the archive is larger than your chosen part size, it will be placed alone in its own part that exceeds the limit. For best results, choose a part size larger than your biggest individual file. Password-protected ZIP archives are not supported. Very large archives (several hundred MB) may be slow to process depending on your device's memory and CPU.
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Frequently Asked Questions About ZIP Splitter
A ZIP splitter is a tool that divides a large ZIP archive into multiple smaller ZIP files, each under a configurable maximum size. Our free zip splitter online uses JSZip to read the original archive and distribute its files across multiple independently extractable parts — entirely in your browser, no server upload required.
No. Our zip splitter reads your archive in a completely non-destructive way. The original .zip file on your device is never modified. The tool only reads the archive data in memory and generates new part files. Your original ZIP archive remains exactly as it was.
Absolutely. Your ZIP archive never leaves your device. Our zip splitter online processes everything locally in your browser using JavaScript — no data is sent to any server. You can safely split ZIP files containing sensitive source code, confidential documents, or private assets without any privacy risk.
Yes, our zip splitter is 100% free with no hidden costs, no signup required, no premium tier, and no usage limits. Split ZIP files online as many times as you need for personal projects, professional work, or enterprise use. Free forever.
Our zip splitter splits at the file level — it cannot split individual files across parts. If a single file inside the archive is larger than your chosen part size, it will be placed alone in its own part that exceeds the limit. To avoid this, choose a part size larger than your biggest individual file.
Each output part is a fully valid, standalone ZIP archive — no special reassembly tool is required. Simply extract each part separately using any ZIP tool (WinZip, 7-Zip, macOS Finder, Windows Explorer). The files from all parts together make up the complete original archive contents.
Choose a part size based on your destination's limit. For Gmail or Outlook email attachments, use 20–25 MB. For most web upload forms, 10 MB is a safe default. For FTP or server uploads, check your host's per-file limit. Our zip splitter includes presets for the most common limits.
No. Our zip splitter does not support password-protected or AES-encrypted ZIP archives. Standard ZIP archives without passwords are fully supported. If your archive is password-protected, remove the password first using our Unlock ZIP tool, then split the unprotected archive.
There is no artificial file size limit in our zip splitter. The practical limit depends on your browser's available memory — most modern browsers can handle ZIP archives up to several hundred megabytes. For very large archives (1 GB+), a desktop tool like 7-Zip may be more reliable.