8 Free Online Text Tools for Writers, Devs & Content Editors

Text manipulation tasks show up constantly across writing, coding, and content work — converting a string to camelCase for a variable name, checking word count against a client’s brief, cleaning a title into a URL-friendly slug. trySandbox’s text tools handle these small, repetitive jobs instantly in the browser. Here are the ones worth bookmarking.

In short: Small text transformations and checks — no software install, results update live as you type.

The most useful text tools, and what they solve

1. Word Counter

Live character, word, sentence, and reading-time counts — a staple for anyone writing to a brief, meta description limit, or social post character cap.

2. Case Converter

Converts between camelCase, snake_case, kebab-case, and more — a small but constant need when naming variables, files, or API fields consistently.

3. Slug Generator

Turns any string into a clean, URL-friendly slug — useful for blog post URLs, product pages, and anywhere titles need to become link-safe text.

4. Lorem Ipsum

Generates placeholder paragraphs, sentences, or words — the classic filler-text tool for mockups and layout testing before real copy is ready.

5. Markdown Preview

A live markdown editor with instant HTML preview — handy for checking how README files, docs, or CMS content will actually render before publishing.

6. Text Diff

Compares two blocks of text line by line — useful for spotting what changed between two versions of a document, config, or paragraph of copy.

7. HTML Escape

Escapes and unescapes HTML entities — needed whenever raw text (with quotes, ampersands, or angle brackets) has to be safely embedded in HTML.

8. Morse Code

Encodes text to Morse and back using the full ITU table — a niche but recurring search, popular for puzzles, hobbyist projects, and novelty use.Browse all 139 tools on trySandbox.io →

Why these stay useful long after the first use

Text tools like these don’t solve one-time problems — case conversion and slug generation come up every time you name something new, word counts matter every time there’s a length limit. That recurring, low-friction utility is exactly what keeps a tool bookmarked instead of forgotten after one use.

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