All 101 online tools, A to Z

Work out an exact age in years, months and days from a date of birth, plus total days, weeks a…

Generate scannable barcodes as SVG or PNG. Check digits calculated for you, proper quiet zones…

Decode Base64 to text or download it as a file. Handles URL-safe input, missing padding, MIME…

Encode text to Base64 or decode it back, instantly and in your browser. Supports UTF-8, URL-sa…

Turn an image into a base64 data URI with ready-made HTML, CSS and Markdown snippets — or past…

Generate and verify bcrypt password hashes in your browser. Choose the cost factor, pick $2y$,…

Work out body mass index in metric or imperial units, see the WHO category, and get the health…

Convert text between upper, lower, title, sentence, camelCase, PascalCase, snake_case and keba…

Convert a CSV between comma, semicolon, tab and pipe separators in your browser. Re-quotes val…

Count characters, code points, graphemes and UTF-8 bytes as you type, and check the text again…

Convert colors between HEX, RGB, HSL, OKLCH and CMYK, check WCAG contrast, and generate a tint…

Make a PDF smaller while keeping its text selectable. Choose extreme, recommended or light com…

Turn a CSV into a real Excel .xlsx workbook in your browser. Leading zeros survive, the delimi…

Turn CSV into a clean HTML table in your browser. Proper escaping, optional header row, and st…

Convert CSV to JSON in your browser. Choose objects, arrays or columns, optionally type number…

Turn CSV into a GitHub-flavoured Markdown table in your browser. Aligned columns, escaped pipe…

Turn CSV into SQL INSERT statements in your browser. MySQL, PostgreSQL, SQL Server and SQLite…

Convert CSV to valid XML in your browser. Column names become legal element names, values are…

Open a CSV and read it as a proper table in your browser. Detects the delimiter, paginates lar…

Convert between 50 world currencies, gold, silver, Bitcoin and Ethereum using live mid-market…

Count the days, weeks, months and working days between two dates, with an option to include th…

Work out a sale price, stack several discounts correctly, find the percentage off from two pri…

Look up live DNS records for any domain — A, AAAA, MX, NS, TXT, SPF, CNAME and SOA. Queried at…

Check whether a domain name is free to register. Asks the registry directly, so a parked or un…

Check whether an email address can actually receive mail. Tests syntax, the domain and its MX…

Work out the monthly instalment on a loan, the total interest, and a full month-by-month amort…

Turn an Excel workbook into CSV in your browser. Choose the delimiter, convert every sheet at…

Convert an Excel workbook to JSON in your browser. Objects, arrays or columns, every sheet at…

Turn any image into a complete favicon set: a multi-size .ico, the PNGs browsers read, an Appl…

Build linear, radial and conic CSS gradients with a live preview. Add as many colour stops as…

Add GST to a net amount or remove it from a tax-inclusive price, with the CGST, SGST and IGST…

Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes instantly in your browser using the Web Cr…

Paste HTML and get an Excel workbook, one sheet per table. Handles colspan, rowspan and messy…

Turn a web address or an HTML file into a PDF, rendered by a real browser engine so modern lay…

See every response header a URL sends, follow the redirect chain hop by hop, and check the sec…

Compress JPG, PNG and WebP images in your browser. Choose a quality level, cap the dimensions,…

Convert images between JPG, PNG and WebP in your browser. Reads GIF, BMP, AVIF and ICO too. Ba…

Crop an image by dragging, or type exact pixel coordinates. Lock to a square, 16:9 or any comm…

See the hidden EXIF data in a photo — including GPS coordinates — and download a clean copy wi…

Resize images to exact pixel dimensions or by percentage, in your browser. Fit, fill and crop,…

Look up any public IP address: country, region, city, coordinates, time zone, currency, and th…

One report covering an IP address: location, network, reverse hostname, threat signals and the…

Find which organisation holds an IP block, the range it belongs to, and the registered abuse c…

Convert an IPv4 address between dotted, decimal, binary and hex, convert CIDR to a subnet mask…

Expand or compress an IPv6 address to RFC 5952 form, work out prefixes and subnet counts, buil…

Identify the provider behind an IP address and what kind of connection it is: residential, bus…

Turn JPG, PNG or WebP images into one PDF, in the order you choose. Set the page size and marg…

Convert JPG to PNG without uploading anything. Batch friendly, keeps full quality, and tells y…

Format, beautify and validate JSON instantly in your browser. Pinpoints syntax errors by line,…

Minify JSON safely by re-serialising it, not by stripping whitespace with a regex. Shows the b…

Convert JSON to CSV in your browser. Flattens nested objects into columns, handles ragged reco…

Turn a JSON file into a real Excel .xlsx workbook in your browser. Flattens nested objects int…

Validate JSON and see every problem in one pass, not just the first. Catches trailing commas,…

Decode a JWT to read its header, payload and claims. Shows expiry, flags unsigned tokens, and…

Generate lorem ipsum by paragraph, sentence, word or list item, as plain text, HTML or Markdow…

Combine several CSV files into one in your browser. Matches columns by name even when files di…

Combine several PDFs into one file, in the order you choose. Runs entirely in your browser — n…

Generate title, description, canonical, Open Graph and X card tags, with a live search preview…

Generate strong random passwords and passphrases in your browser. Cryptographically secure, ne…

See who made a PDF, what software wrote it, when, and what size its pages are. Runs entirely i…

Turn every page of a PDF into a JPG, PNG or WebP image at the resolution you choose. Runs in y…

Work out percentages six ways: X% of Y, what percent one number is of another, increase, decre…

Convert PNG to JPG in your browser with a matte colour you choose, so transparency never turns…

Check whether a TCP port on a public host accepts connections from outside your network, and t…

Encrypt a PDF with AES-256 so it cannot be opened without your password. Control printing and…

Create QR codes for links, Wi-Fi, contacts, email and SMS. Download as PNG or SVG. No account,…

Scan a QR code from an image or your camera and see the full destination, with a safety check…

Test regular expressions with live highlighting, capture groups and replace. Runs safely in a…

Remove repeated lines from a list, keep the first or last copy, or show only the lines that ap…

Find or remove duplicate CSV rows in your browser. Match on chosen columns, ignore case and sp…

Keep, drop or reorder CSV columns in your browser. Select by heading, position or range — and…

Build a robots.txt, then test any URL against it to see exactly which rule applies and why. Co…

Rotate PDF pages 90, 180 or 270 degrees and save the result permanently. Choose all pages or j…

Crawl a site from one URL and build a valid XML sitemap. Honours robots.txt, follows redirects…

Turn titles into clean, lowercase URL slugs. Handles accents, symbols and punctuation properly…

Sort CSV rows by one or more columns in your browser. Natural, numeric and alphabetical orderi…

Split a large CSV into several files in your browser. By row count, into equal parts, or one f…

Split a PDF into separate files or pull out just the pages you need. Runs entirely in your bro…

Inspect the live TLS certificate a domain serves: when it expires, who issued it, and exactly…

Find subdomains observed for a domain, each with the dates it was first and last seen, so you…

Work out the network, broadcast and usable host range for any IPv4 CIDR block, and split a net…

Compare two texts side by side and see exactly what changed. Line, word or character level, wi…

Sort a list of lines alphabetically, numerically, naturally or by length, with optional de-dup…

Work out the hours and minutes between two times, deduct a break, handle overnight shifts, and…

Convert Unix timestamps to readable dates and back. Handles seconds, milliseconds and microsec…

Convert tab-separated text to CSV in your browser. Paste straight from Excel, Sheets or Number…

Remove the password from a PDF you can already open, so you can merge, split or edit it. Files…

Decode percent-encoded URLs and query strings. Handles + as space, repeated encoding, and poin…

Encode or decode URLs and query strings instantly in your browser. Handles UTF-8, full URLs an…

Break a URL into its parts, list its query parameters, strip tracking codes to get the canonic…

Paste a user-agent string to identify the browser, engine, operating system and device, and to…

Generate cryptographically random UUIDs in bulk. Supports version 4 and time-ordered version 7…

Check whether an IP address belongs to a VPN, proxy, Tor exit node, private relay or hosting p…

Convert images to WebP for smaller files, or convert WebP to PNG and JPG so older software can…

See the public IP address your connection is using right now, along with your provider, connec…

Look up a domain's registration record: when it was created, when it expires, which registrar…

Count words, characters, sentences and paragraphs as you type. Includes reading time, speaking…

Pull the tables out of a Word document into an Excel workbook, one sheet per table. Runs in yo…

Format XML with proper indentation, or minify it. Checks that tags are balanced and preserves…

Convert XML to CSV in your browser. Finds the repeating record element automatically, flattens…

Reformat YAML with consistent indentation, check it for errors, and convert between YAML and J…