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Formatter Tools

Beautify or minify code and text—JSON, HTML, CSS, JavaScript, XML and more—for cleaner diffs and smaller payloads with maximum efficiency and readability.

33 tools available

Data Tools 4

Data Converter Hub

Convert CSV, JSON, XML, YAML, Excel and SQL INSERT statements both ways. Fast, private, offline conversion in your browser - nothing is uploaded.

CSV Cleaner

Clean CSV & JSON online: deduplicate, fix UTF-8 encoding, remove blank rows, profile column quality. 100% browser-based, no upload, private.

CSV Encoder

Fix CSV/TSV delimiters, add UTF-8 BOM for Excel, normalize quotes and line breaks, and validate column counts against RFC 4180 before import.

Excel Viewer

Preview Excel spreadsheets (.xlsx, .xls) in your browser. Switch sheets, copy to clipboard, export CSV. SheetJS-powered, files never leave your device.

Developer Tools 12

Formatter & Minifier 10

CSS Formatter & Minifier

Prettier-powered CSS formatter and minifier. Beautify or compress stylesheets 100% in your browser and see exact bytes saved, percent reduction and gzip size.

HTML Formatter & Minifier

Prettify, minify and validate HTML online. Collapse whitespace for production, preserve <pre>/<script>, get W3C-style indentation and unclosed-tag checks.

JSON Formatter & Minifier

Format, minify and validate JSON with a collapsible tree, JSONPath query, duplicate-key detection and line/column error location. RFC 8259 strict.

JavaScript Formatter & Minifier

JavaScript formatter and minifier powered by Prettier with live syntax validation and size-reduction readout. Runs locally, supports ES6+, async/await.

Markdown Formatter

Format Markdown and generate a GitHub-compatible table of contents with anchor links. Normalise headings, list markers, spacing; live HTML preview.

PHP Formatter & Minifier

Free online PHP formatter, beautifier, minifier and PSR-12 / PER-CS compliance checker. Runs 100% in your browser, so private code never leaves your machine.

Python Formatter & Minifier

Browser-side Python formatter, minifier and PEP 8 checker: normalise indentation, add blank lines, highlight syntax and flag style issues with line numbers.

SQL Formatter & Minifier

Format, beautify and safely minify SQL across 15 dialects (BigQuery, Snowflake, Redshift, T-SQL, PostgreSQL). Safety lint flags UPDATE/DELETE with no WHERE.

XML Formatter & Minifier

Format, minify, validate and run XPath on XML online: SOAP, SVG, RSS/Atom, XSD/XSLT, Maven POM, sitemaps and Spring/Android config, with CDATA-safe minify.

YAML Formatter & Minifier

Free online YAML formatter, minifier and validator. Beautify or minify YAML and validate syntax with exact error line and column for Kubernetes, Docker.

Utilities 2

Markdown cheatsheet

Searchable Markdown cheatsheet with live preview and copy-paste snippets for README files: headings, tables, task lists, links, code, callouts and math.

OpenAPI Spec Validator

Validate an OpenAPI 3.x JSON or YAML spec online: lint structure, summarize endpoints, detect broken $ref, catch missing 401/403 and undeclared params. Free.

File Tools 1

Batch Rename

Batch rename files online: regex find/replace, prefix/suffix, sequential numbering, change case, ZIP download. 100% in-browser, private, no upload.

Social Media Tools 1

X Thread Maker

Create engaging X (Twitter) threads automatically. Split long text into 280-character tweets with smart breaks, auto-numbering, and export to TXT.

Text Tools 15

Markdown TOC

Free online Markdown table of contents generator for READMEs and docs. GitHub heading slugs, anchor-link health check, CommonMark/GitLab styles, client-side.

Case Converter

Convert text to camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, UPPERCASE, lowercase, Title Case or Sentence case — instantly in your browser.

Citation Generator

Free APA, MLA, Chicago, Harvard & IEEE citation maker. Generate in-text citations, works cited entries and BibTeX export for books, journals & websites.

Find and Replace

Clean data, scrub logs, refactor code and reformat dates with regex find and replace. Capture-group backreferences ($1, $2) and multi-rule batch passes.

Line Numbering

Add or strip line numbers from any text or code snippet. Custom prefix, suffix, separator, starting index, and skip-blank options. 100% browser-side.

Markdown to HTML

Convert Markdown to HTML online with live preview, in-browser (no upload). GitHub Flavored Markdown, heading anchors, table of contents, export to file.

Remove Diacritics

Strip accents from Vietnamese, French, Spanish, Portuguese text. Output plain ASCII, a URL slug, or a filesystem-safe filename. Runs in your browser.

Remove Duplicate Lines

Deduplicate any text list, log, CSV, or email list in one click. Keeps first occurrence, optional sort, case-insensitive matching, and removed-lines view.

Remove Empty Lines

Remove empty lines and duplicate lines from text, code, logs, or lists in one pass. Optional sort and case conversion. Free and runs in your browser.

Reverse List

Reverse a text list in one click: undo a sort, tail logs newest-first, flip CSV rows, reverse comma-separated items, or reverse word order per line.

Sort Lines

Sort lines alphabetically A-Z, Z-A, by length, natural number order, by column, or shuffle. Remove duplicate lines, trim, dedupe. Free, in your browser.

Text Cleaner

Clean text online: strip HTML & Markdown, remove emojis and zero-width chars, rejoin PDF line breaks. Ideal for ChatGPT/Claude output and messy pastes.

Text Repeater

Repeat any text 1 to 10,000 times with a custom separator, plus a {n} counter token for sequential mock data, CSV test rows, and load-test payloads.

Word Replacer

Find and replace any word, phrase, or pattern in text with a match preview. Supports regex, whole-word, bulk multi-pair. No upload, private, in-browser.

Zalgo Text Generator

Free zalgo text generator with adjustable intensity for Discord, X, and more. Copy and paste glitch text, or use the built-in zalgo decoder to remove zalgo.