Is the source code available?

The runtime JavaScript is visible via View Source / DevTools. Anyone can audit what’s actually running in their browser. For projects requiring source-code review, also check our /source page.

Does this work on mobile?

Most do. Touch UX may be sub-optimal vs desktop for tools requiring large pastes or precise editing. Mobile dev work is best done on tablet+keyboard if you’ll use these tools regularly.

How does this compare to a CLI version?

Functionally equivalent for typical inputs. CLI versions handle larger files, batch processing, and scripting; this is faster for one-off ad-hoc use. For team-wide use, CLI in a versioned dependency is more durable.

What browsers are supported?

Chrome 90+, Firefox 88+, Safari 14+, Edge 90+. Older browsers may lack some Web Crypto APIs needed for hashing/encoding tools. ~98% of dev users are on supported versions.

What’s the maximum input size?

Browser-dependent: ~10-100MB safely. Beyond that, you’ll see UI freezes or out-of-memory errors. For production-scale data, use a CLI tool with streaming.

What’s the difference between this and Postman / Insomnia?

Postman / Insomnia are full-featured API clients with collections, environments, scripting. This is a focused single-task tool. Use this for quick standalone work; Postman / Insomnia for sustained API development workflows.

Text & Writing Utilities · Free tool

TXT Splitter

Divide a TXT file by line count, character count, or size instantly. Download each chunk with all processing done securely in your browser for free.

Updated June 2026

Input Text

Split Mode

Characters per chunk

Chunks

Total chars

513

Avg size

103

Chunk 1 · 120 chars

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliq

Chunk 2 · 120 chars

ua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in volupt

Chunk 3 · 120 chars

ate velit esse.
Excepteur sint occaecat cupidatat non proident, sunt in culpa.
Nemo enim ipsam voluptatem quia voluptas

Chunk 4 · 120 chars

sit aspernatur aut odit.
At vero eos et accusamus et iusto odio dignissimos ducimus qui.
Quis autem vel eum iure reprehe

Chunk 5 · 33 chars

nderit qui in ea voluptate velit.

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What it does

Paste or upload a .txt and split it by line count, character count, or size. Download each chunk. Everything runs in your browser. Engineering teams routinely waste hours per week on transformations that should take seconds.

Translating into daily-driver use: team-wide standardization on a public utility eliminates “works on my machine” for shared transformations. Instead of arguing about jq versions, everyone uses the same browser-based tool.

Practical considerations: JavaScript number precision (53-bit integers, 64-bit floats) limits some math; for very-large-number arithmetic, use BigInt-aware tools. A common pitfall: relying on browser quirks that differ across Chromium / Firefox / Safari.

Embed this tool on your siteShow snippet

Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.

<iframe src="https://freetoolarena.com/embed/txt-splitter" width="100%" height="720" frameborder="0" loading="lazy" title="TXT Splitter" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>

Embed docs →

How to use it

Open the tool and review the interface.
Enter or paste your input.
Configure any relevant options.
Run the tool and review the output.
Iterate or refine based on the result.

When to use this tool

Onboarding teammates who lack the local tooling.
Sensitive transformations where data shouldn’t hit a third-party server.
Quick one-off transformations that don’t justify a CLI install.
Generating fixtures or test data without writing a script.

When not to use it

When the operation must be reproducible 5 years from now (web services churn).
Bulk transformations across thousands of files (use a CLI batch tool).
Performance-critical hot paths where browser overhead matters.
When the data is too large to fit in browser memory.

Common use cases

Pre-decision sanity-check on inputs and outputs
Educational use — demonstrating the underlying concept
Onboarding a colleague who needs the same calculation/conversion
Verifying a number or output before passing it on

Frequently asked questions

Is the source code available?: The runtime JavaScript is visible via View Source / DevTools. Anyone can audit what’s actually running in their browser. For projects requiring source-code review, also check our /source page.
Does this work on mobile?: Most do. Touch UX may be sub-optimal vs desktop for tools requiring large pastes or precise editing. Mobile dev work is best done on tablet+keyboard if you’ll use these tools regularly.
How does this compare to a CLI version?: Functionally equivalent for typical inputs. CLI versions handle larger files, batch processing, and scripting; this is faster for one-off ad-hoc use. For team-wide use, CLI in a versioned dependency is more durable.
What browsers are supported?: Chrome 90+, Firefox 88+, Safari 14+, Edge 90+. Older browsers may lack some Web Crypto APIs needed for hashing/encoding tools. ~98% of dev users are on supported versions.
What’s the maximum input size?: Browser-dependent: ~10-100MB safely. Beyond that, you’ll see UI freezes or out-of-memory errors. For production-scale data, use a CLI tool with streaming.
What’s the difference between this and Postman / Insomnia?: Postman / Insomnia are full-featured API clients with collections, environments, scripting. This is a focused single-task tool. Use this for quick standalone work; Postman / Insomnia for sustained API development workflows.

Learn more

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