A brief history of Diff Checker — where this idea came from
Where the Diff Checker approach was originally invented, and how it ended up in every text editor since.
Most inputs you work with don't justify opening Word. Diff Checker is for the in-between cases — paste, transform, paste back. Browser-local, no signup, no character limits.
Try it now: Diff Checker — Everything happens locally in your browser — your file never leaves your device.
A brief history
Counting words and characters in software is old — older than the first word processor. Early word processors built it in because writers and editors had been doing the equivalent by hand for centuries. Diff Checker is the modern, browser-local version of a habit that long predates the computer.
Use the tool
Free, no account required, no watermark.
Frequently asked questions
Does Diff Checker count characters with or without spaces?
Diff Checker shows both counts simultaneously, so you can use whichever your target requires.
Is there a length limit?
Practically, several MB of text. Beyond that the browser starts to lag.
Will Diff Checker work offline?
Yes — once the page loads, processing happens locally with no further network calls.
Does Diff Checker save my text?
No. Diff Checker processes everything in your browser; nothing is uploaded or stored.
Related guides
- Diff Checker for non-English text — Hindi, Spanish, Arabic, and more
- Diff Checker vs office-suite built-in counts
- Diff Checker for SEO — meta descriptions, titles, alt text
- Diff Checker for developers — README files, docs, commit messages
- A brief history of Character Counter — where this idea came from
- A brief history of Find & Replace — where this idea came from
Ready to try it?
Use the tool: Diff Checker. Everything happens locally in your browser — your file never leaves your device.
Last reviewed May 2026. File-size limits, portal requirements, and software defaults change over time — always verify with the destination platform before uploading time-sensitive documents. References to third-party services and products are for descriptive purposes only and do not imply any partnership or endorsement.