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Text Inspector

Analyze character counts, text composition, frequent words, long sentences, and writing patterns entirely in your browser.

View on GitHub

Local processing

About your filesFiles and content selected in this tool are processed in your browser and are not uploaded to a Browser Kitty backend.

Operation demo See the basic workflow in a short video.

About this tool

Text Inspector goes beyond a basic character counter by combining text volume, composition, frequent terms, and lightweight writing checks in one interface. It updates character, word, sentence, paragraph, line, reading-time, speaking-time, and manuscript-sheet estimates while you type.

It visualizes the balance of Japanese scripts, letters, numbers, and symbols, and lets you select frequent terms to highlight every occurrence in an X-Ray view. Lightweight rules flag long sentences, repeated words, repeated spaces, and punctuation, with direct jumps to the relevant text. Your writing is not sent to an external server.

Good for

Write within character limits for social posts, applications, and forms
Check whether a blog post, report, or explanation overuses the same terms
Find long sentences and repeated spaces quickly before editing
Review the balance of scripts, letters, numbers, and symbols across a document

What it can do

Key capabilities available in this tool.

Real-time character, word, sentence, paragraph, and reading-time counts
Visual breakdown of Japanese scripts, letters, numbers, and symbols
Frequent-word ranking with X-Ray highlights in the source text
Checks for long sentences, repeated words, spaces, and punctuation
Character-count targets with a compact mobile progress meter

How to use

Open the tool and type or paste the text you want to inspect.
Review the live character, word, sentence, paragraph, and reading-time counts.
Use Composition to inspect character categories, then choose terms in Frequent Words to highlight them in X-Ray.
Review the Writing Checks and jump directly to flagged locations when useful.
Optionally set a preset or custom character-count target and track remaining or excess characters.

Supported

Counts ordinary Unicode text including Japanese and English entirely in the browser.
Uses Intl.Segmenter for frequent-word segmentation when the browser provides it.
Supports undo/redo shortcuts and character counts for the current selection.
Works on desktop and mobile, with a compact mobile bar for count and navigation.

Limitations and notes

Writing checks are lightweight heuristics, not grammar correction or AI-based writing evaluation.
Word segmentation may vary by browser and language.
Reading, speaking, and manuscript-sheet estimates are approximate.
Autosaved text is stored in localStorage and can be lost when browser site data is cleared.

Frequently asked questions

Is my text sent to a server?

No. Counting, composition analysis, frequent-word extraction, X-Ray highlighting, and writing checks run in your browser.

Does it automatically correct grammar and typos?

No. It provides explainable lightweight checks such as long sentences, repeated words, spaces, and punctuation as prompts for manual editing.

Can I write against a character limit such as 140 characters?

Yes. Set preset targets such as 140, 400, or 800 characters, or enter a custom target to track remaining or excess characters.

Offline version and source code

There are no runtime CDN or external-library dependencies. The regular and gzip self-extracting single-HTML builds can be saved locally and used offline.

View source on GitHub