Utilities

Count words, characters, sentences and reading time.

Pretty-print, minify and validate JSON instantly.

Convert HEX, RGB, HSL and CMYK colors with a visual picker.

Generate high-resolution QR codes with logo and color options.

Convert Unix timestamps to readable dates in any timezone.

Turn typed text into realistic handwriting — free handwriting fonts, paper styles and natural jitter, exported as PNG or PDF.

Reading level, sentence length and the hardest sentences — calculated in your browser.

MD5, SHA-1, SHA-256, SHA-384 and SHA-512 for any text — computed in your browser.

Generate UUID v4 and time-ordered v7 in bulk.

Strong passwords with an honest entropy estimate — generated offline in your browser.

Encode text to Base64 or decode it back, UTF-8 safe, with a URL-safe option.

Read a JWT's header and payload, and see when it expires.

camelCase, snake_case, kebab-case, Title Case and slugs from one input.

Length, weight, temperature, area, volume, speed and data units.

Days between dates, add or subtract days, and exact age.

Test a regular expression against your text, with groups and a replace preview.

Convert CSV or TSV to JSON, and JSON back to CSV.

Placeholder text by paragraphs, sentences or words.

BMI, category and healthy weight range, in metric or imperial.

Monthly payment, total interest and an amortization table.

Code 39, EAN-13 and EAN-8 barcodes with checksum validation.

Create a clean PDF invoice with line items, tax and discount.

Convert between XLSX, CSV, TSV and JSON, right in your browser.

Compare two documents and see every added, removed and changed line.

Convert SRT, WebVTT and ASS subtitles, and shift the timing.

Turn Markdown into clean HTML you can paste into a page or email — headings, bold, lists, code, quotes and links, with everything escaped.

Turn HTML into clean Markdown you can store in a knowledge base or paste into a README — headings, links, lists, code and quotes.

Paste a regular expression and get a plain-language breakdown of every part — useful when you inherit a pattern you cannot read.

Check a cron expression, read a plain-language breakdown of each field, and see the next few run times.

Split a URL into its parts — protocol, host, path, hash — and list every query parameter, then rebuild it.

Reformat pasted SQL so the clauses line up — SELECT, FROM, WHERE, JOIN and the rest each start on their own line — or squeeze it back onto one line.

Look at text character by character and catch the invisible ones — zero-width spaces, control codes, combining marks and look-alike letters.

Convert one moment across time zones: give a date and time in one zone and see it in a list of others, with each zone's UTC offset.

Convert integers between binary, octal, decimal and hexadecimal, with a nibble-grouped bit view. Handles very large numbers.

Check the contrast between a text colour and a background colour against the WCAG AA and AAA thresholds.

Encode text into HTML entities or decode entities back to text — handy for escaping user input or fixing double-escaped copy.

Build a clickable table of contents from the headings in your Markdown, with GitHub-style anchors and nested levels.

Pretty-print XML with the indent you choose, or minify it back to one line — with a well-formedness check first.

Work out an IPv4 subnet from a CIDR or netmask: network and broadcast address, mask, host range and how many addresses are usable.

Strip Markdown formatting and get plain text you can paste into an email, a form or anywhere that does not render Markdown.

Build a CSS linear or radial gradient with a live preview and copy the ready-to-use background rule.

Turn a base colour into a complementary, analogous, triadic or tetradic palette, plus a dark-to-light ramp and CSS custom properties.