What's the difference between Personal and Studio?

Personal ($39) is for one person — unlimited use on one active device at a time. Activate on a new device and the old one signs out. Studio ($199) is for teams and commercial client work — unlimited team members, early access to new tools, and a commercial license.

Do I need an account?

No. Use any tool free up to 5 times per day on compute-heavier tools, and unlimited on lightweight ones. No card, no account, no signup required.

Where are my files processed?

Right on your device. Files never upload to any server. Everything runs in your browser — you can verify in DevTools → Network.

What happens if I use my Personal license on a second device?

The new device activates and the old device signs out. Your license key stays the same — you just move it between devices as needed. No limit on how often you switch.

Does this work on my phone?

Yes. Every tool works on iPhone, Android, tablet, and desktop.

What if I want a refund?

30-day money-back guarantee on both tiers. No questions asked. Email sales@cipherforces.com.

Will you add more tools?

Yes. New tools ship regularly. Your license includes every tool we ever release — Studio members get early access.

BusinessBy Daniel BeglaryanUpdated August 2026

Split CSV Files

Break one big CSV into smaller files by row count or by a column's values.

PrivateWorks OfflineNo Account

Drop a CSV file here

paste works too — Ctrl+V / ⌘V

CSVTSVTXT

Max 50MB

Everything runs in your browser — your file never leaves your device. Split by a fixed row count or by the values in one column, and the header row is copied onto every output file.

Deep dive

About Split CSV Files.

Split a Big CSV Into Smaller Files

Drop in one CSV and get back several — either a fixed number of rows per file, or one file per unique value in a column you choose. The header row is copied onto the top of every output file, so each piece opens cleanly in Excel, Google Sheets, or any importer. A single result downloads on its own; multiple files come back zipped together.

It runs entirely in your browser. Nothing is uploaded, so it is safe for customer lists, exports, and anything with names, emails, or order data in it — the kind of file you should not paste into a random website. There is no row cap, no signup, and no watermark on the output.

Common Use Cases

Import limits: Break a 200,000-row export into 10,000-row chunks that fit a CRM, email platform, or e-commerce importer's per-file cap.
One file per group: Split a master sheet into a separate CSV for each region, salesperson, store, or status.
Clean handoffs: Send each team only their own rows instead of the entire list.
Email attachments: Slice an oversized CSV into pieces small enough to attach.
Safe test runs: Pull a manageable first chunk to trial an import before running the full load.

An honest caveat: because everything runs in the tab, the whole file has to fit in your browser's memory — very large files (hundreds of MB) can be slow on older machines, and splitting by a column with thousands of unique values is capped to keep the browser responsive.

Privacy: This tool runs entirely in your browser. Your CSV is parsed and split on your own device and never leaves it.

Three steps