MiniTools — 50 small web utilities

Text

10 tools

ASCII Banner

Turn a short phrase into big block letters for a console splash or a comment.

Case Converter

camelCase, snake_case, kebab-case, Title Case, and eleven more, one click each.

Line Tools

Sort, dedupe, number, trim, wrap, reverse and shuffle a list of lines.

Lorem Ipsum

Placeholder copy in classic Latin or plain English, by word, sentence, or paragraph.

Markdown Preview

Write Markdown on the left, see it rendered on the right, take the HTML with you.

Regex Tester

Run a pattern against sample text with live highlighting and capture groups.

Table Formatter

Paste rough columns and get a tidy Markdown, ASCII or HTML table back.

Text Diff

Compare two blocks of text line by line, or word by word inside a line.

Text Stats

Counts, reading time, readability grade, and the words you lean on most.

Word Descrambler

Find every word hiding in a pile of letters, with blanks and pattern matching.

Data and code

6 tools

CSV Converter

Paste a spreadsheet and get JSON, or feed it JSON and get a clean CSV back.

JSON Formatter

Pretty-print, minify, sort keys, and get the exact line where parsing broke.

JSON to Code

Generate C# records, TypeScript interfaces, Python or Go types from sample JSON.

SQL Formatter

Lay a query out on readable lines, or squash it back down to one.

Test Data Generator

Make believable rows of people, dates and numbers as JSON, CSV or SQL.

XML and JSON

Turn XML into JSON or JSON into XML, with attributes and text nodes handled.

Encoding

6 tools

Base64 Converter

Encode and decode text or files, standard or URL-safe alphabet.

Cipher Tools

ROT13, Caesar, Atbash, Vigenere and rail fence, with a shift-cracking helper.

Escape Tool

Escape and unescape text for HTML, JavaScript, JSON, XML, CSV, SQL, shell and regex.

Morse Code

Translate either direction and hear it played back at the speed you choose.

Unicode Inspector

Break text into code points, see the invisible ones, and get every escape form.

URL Inspector

Percent-encode, decode, and take a URL apart into its query parameters.

Numbers

7 tools

Aspect Ratio

Scale a width or height while keeping the shape, and name the ratio you have.

Base Converter

Binary, octal, decimal, hex and every base to 36, with a bit board and bitwise maths.

Loan Calculator

Monthly payment, total interest, and the full month-by-month payoff schedule.

Number Names

Spell a number out in words, as an ordinal, as currency, or in Roman numerals.

Percentage Calculator

Every percentage question at once: of, out of, change, markup, tip and tax.

Random Picker

Roll dice, flip coins, draw numbers, shuffle a list, or split a crowd into teams.

Unit Converter

Length, mass, volume, area, speed, temperature, data, time, pressure, energy.

Time and dates

4 tools

Cron Explainer

Read a cron expression back in English and list the next times it fires.

Date Calculator

Days between two dates, add or subtract a duration, count working days, find an age.

Stopwatch and Timer

A stopwatch with laps, a countdown with an alarm, and a pomodoro cycle.

Timestamp Converter

Move between Unix time, ISO 8601, and human dates across any time zone.

Images and colour

5 tools

Color Studio

Convert between HEX, RGB, HSL, build tints and shades, and check WCAG contrast.

EXIF Viewer

See the camera, settings, date and GPS your photos are quietly carrying.

Gradient Generator

Build a linear, radial or conic CSS gradient and copy the exact rule.

Image Color Picker

Pull the exact colour from any pixel of an image, and pull out its palette.

Image Resizer

Resize, crop, rotate and re-encode a picture without it ever leaving your machine.

Security

5 tools

Hash Generator

SHA-1, SHA-256, SHA-384, SHA-512, MD5 and CRC32 over text or a dropped file.

ID Validator

Check the check digit on an ISBN, IBAN, VIN, EAN, IMEI or card number.

JWT Decoder

Split a token into header, payload, and signature and read the claims.

Password Generator

Random strings and passphrases from the browser crypto engine, scored as you go.

Text Encrypt

Lock a note with a passphrase using AES-GCM, and unlock it again later.

Codes and IDs

3 tools

Barcode Generator

Code 128, EAN-13 and UPC-A barcodes, with the check digit worked out for you.

GUID Generator

Batch out RFC 4122 v4 or v7 identifiers in the format your code expects.

QR Generator

Turn a link, note, or Wi-Fi login into a QR code and save it as PNG or SVG.

Files and systems