All Tools

Add a prefix and/or suffix to every line. Optionally skip empty lines. Handy for bullets, quotes, SQL lists, and bulk formatting.

Convert text between uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case, and kebab-case. Handy for renaming variables, headings, and API fields—all in your browser.

Remove duplicate lines from a list while keeping the first occurrence of each line. Free online dedupe tool.

Find and replace plain text instantly in your browser. Optional case-insensitive matching. Free online find and replace tool.

Sort lines alphabetically ascending or descending. Optionally remove duplicates while sorting. Free online line sorter.

Preview Markdown as HTML while you type. Supports headings, lists, links, code fences, and emphasis—ideal for README drafts and docs, with no upload required.

Remove blank and whitespace-only lines from text. See how many lines were removed. Free online empty line remover.

Convert blog titles, product names, and headings into clean kebab-case slugs for URLs, filenames, and IDs. Instant, private, and free in your browser.

Paste two versions of a document, config, or code snippet and see added and removed lines at a glance. A simple line-oriented diff that stays in your browser.

Trim leading, trailing, or both sides of whitespace on every line. Free online line trimmer for lists, code, and pasted text.

Clean whitespace: collapse multiple spaces, normalize line endings, convert tabs to spaces, or strip all whitespace. Free online whitespace tool.

Paste any text to count words, characters (with and without spaces), lines, and sentences instantly. Runs fully in your browser—nothing is uploaded.