Online Tools HarborDeveloper Tools
Format JSON, XML and CSS, view HTML, compare text, decode JWTs and convert timestamps. 15 free tools, no sign-up.
HTML ViewerPaste HTML and preview it live, side by side, in a safe sandbox.JSON Formatter & ValidatorBeautify, validate and minify JSON with clear error messages.Text Compare (Diff Checker)Compare two texts and highlight the differences by word, line or character.JSON MinifierMinify JSON by removing whitespace to reduce its size.JSON to CSVConvert a JSON array of objects to CSV for Excel or Google Sheets.CSV to JSONConvert CSV (with header row) to a JSON array of objects.XML FormatterPretty-print and indent XML, sitemaps and RSS feeds, or minify them.HTML MinifierMinify HTML by removing comments and collapsing whitespace.CSS Minifier & BeautifierMinify CSS for production or beautify it to make it readable.Markdown to HTMLConvert Markdown to clean HTML (GitHub-flavoured).JWT DecoderDecode a JSON Web Token header and payload and show expiry dates. Runs locally.Unix Timestamp ConverterConvert Unix timestamps (seconds or milliseconds) to dates and dates to timestamps.Color Converter (HEX, RGB, HSL)Convert colors between HEX, RGB, HSL and CMYK.URL ParserBreak a URL into protocol, host, path, query parameters and hash.JSON / String EscapeEscape text to a JSON string literal, or unescape it back.
Other categories
AI ToolsFree AI writing and productivity tools: paraphrase, summarize, fix grammar, write emails and more.Text ToolsClean up text: remove whitespace and line breaks, find and replace, convert HTML to text and more.ExtractorsPull emails, URLs, numbers, sitemap links or any regex match out of a block of text.Line ToolsSort, dedupe, number, shuffle, filter and join lines of text.Case ConvertersConvert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case and more.Encoders & DecodersBase64, URL, HTML entities, binary, hex, Morse code and hash generators.GeneratorsGenerate passwords, UUIDs, random numbers, Lorem Ipsum, QR codes and random topics.SEO & Web ToolsSitemap URL extractor, meta tag generator, slug generator, UTM builder and keyword density checker.PDF ToolsMerge, split, rotate and convert PDF files privately in your browser. Files never leave your device.ConvertersUnit converters (cm to inches, kg to lbs, °C to °F…), number bases, Roman numerals and numbers to words.Passwords & SecurityGenerate strong passwords and passphrases, check password strength and hash with bcrypt, all locally.Business & LegalCreate invoices, quotes and receipts as PDF, and generate a privacy policy, shipping policy, return & refund policy, terms and conditions, cookie policy and disclaimer for your website or online store.Business CalculatorsFree business, marketing and e-commerce calculators: break-even, ROAS, CPA, CPC, CPM, ROI, profit margin, markup, conversion rate, LTV, CAC, VAT and more.Image ToolsConvert, compress and resize images in your browser. Nothing is uploaded.Video ToolsCompress, trim, convert and mute videos, make GIFs, extract MP3 audio, detect scenes and download YouTube thumbnails, privately in your browser.