TTKTheTextKit

Free Online Text, Developer & Math Tools

Count words, format JSON, convert units, work out loans and percentages. Every tool runs in your browser, so nothing you type is uploaded.

Text Analysis & Counting

Accurate metrics for words, characters, sentences, reading duration, and lexical density.

See all 10 Analysis & Counting tools →

Case & Formatting

Transform casing formats, clean whitespace, and generate search-engine-friendly slugs.

Line & List Operations

Organize raw lists, remove duplicate entries, sort alphabetically or by length, and number items.

Developer & Web Tools

Encoders, formatters, converters, time zone and timestamp tools, and security generators for web developers and programmers.

See all 44 Developer & Web tools →

Writing & Content Tools

Generate placeholder text, reverse phrasing, and streamline content drafting.

Text Extraction

Pull emails, links, numbers, and phone numbers out of any block of text — instantly, in your browser.

Student Tools & Calculators

Calculate semester and cumulative GPAs, weighted course grades, ages and the days between dates, privately.

See all 13 Student Tools tools →

Math & Money Calculators

Percentages, fractions, GCD and LCM, prime factors, tips, discounts, compound interest and loan payments, calculated exactly.

See all 37 Math & Money tools →

SEO & Marketing Tools

Generate meta tags, preview search snippets, and build tracking links — the text-based building blocks of SEO and campaigns.

See all 11 SEO & Marketing tools →

Format Conversion

Convert between Markdown, HTML, YAML, and JSON — the formats developers move data and docs through every day.

See all 14 Format Conversion tools →

Latest guides

All articles →

Why use TheTextKit

  • Private by design

    Every tool runs in your browser. What you type or paste is never uploaded or stored.

  • Checked, not guessed

    Our guides show how the tools were tested against independent references, with the numbers.

  • Free and simple

    No account, no sign-up and no limits on how much text you process.