Resources

Developer toolsOne job each, done properly

The small conversions that interrupt everything else: decode this string, format that blob, work out what the encoded thing in the log actually says. Each tool here does one of them, and explains what it did underneath.

Everything runs in your browser. Nothing is uploaded, nothing asks you to sign up, and there is no ad reading over your shoulder.

26 tools in 6 categories

Encoding

1 tool

Converting data between representations: text to Base64, bytes to hex, characters to escape sequences.

Locked padlock with a key icon

Base64 Encoder and Decoder

Encode text to Base64 and decode it back in your browser. Handles UTF-8, URL-safe base64url and padding, and uploads nothing.

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Formatting

3 tools

Making structured data, code and text readable and checking it is valid: pretty-print, minify and validate JSON, format or minify SQL queries, and write Markdown with a live preview.

JSON logo

JSON Formatter and Validator

Format, validate and minify JSON in your browser. Errors show the exact line and column, numbers are never altered, and nothing is uploaded.

Open toolFile cabinet icon

SQL Formatter and Beautifier: Format SQL Online

Format SQL online: indent queries, upper-case keywords or minify them, for PostgreSQL, MySQL, SQL Server and SQLite. Runs in your browser, uploads nothing.

Open toolMemo icon

Markdown Editor: Online Markdown Preview and Markdown to HTML

Write Markdown online with a live preview: tables, task lists and highlighted code, GitHub style. Copy the HTML or download a .md. Nothing is uploaded.

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Conversion

2 tools

Turning one data format into another without changing the data: JSON to YAML and back, and JSON to CSV and back, with key order and big numbers kept exactly.

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JSON to YAML Converter (and YAML to JSON)

Convert JSON to YAML and YAML to JSON online. Strings like "yes" and "0123" stay strings, errors show the line and column, and nothing is uploaded.

Open toolBar chart icon

JSON to CSV Converter (and CSV to JSON)

Convert JSON to CSV and CSV to JSON online. Nested objects flatten to columns, pick comma, semicolon or tab, and get a .csv for Excel. Nothing is uploaded.

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CSS and Colour

6 tools

Working with colour and CSS in the browser: convert colours between HEX, RGB, HSL and OKLCH, check contrast, build gradients, box shadows and glassmorphism, and shape easing curves.

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Color Converter: HEX to RGB, HSL and OKLCH

Convert colours between HEX, RGB, HSL, HWB, OKLCH and CMYK. Paste any CSS colour, edit any format and the rest update. Runs in your browser.

Open toolYin-yang contrast symbol icon

WCAG Color Contrast Checker

Check colour contrast against WCAG AA and AAA for text and UI. Get the nearest passing colour, with transparency handled. Runs in your browser.

Open toolRainbow icon

CSS Gradient Generator: Linear, Radial and Conic

Make linear, radial and conic CSS gradients. Drag colour stops, start from a preset and copy clean, unprefixed CSS. Runs in your browser.

Open toolFramed picture icon

CSS Box Shadow Generator: Layers and Inset

Make CSS box shadows with offset, blur, spread, colour and inset. Stack and reorder layers, start from a preset, copy the CSS. Runs in your browser.

Open toolCrystal ball icon

Glassmorphism Generator: Frosted Glass CSS

Make a frosted glass effect in CSS. Set blur, transparency, saturation, border and radius, then copy CSS with the Safari prefix and a fallback.

Open toolRoller coaster icon

Cubic-Bezier Generator: CSS Easing Curves

Make a CSS cubic-bezier easing curve by dragging two handles. Compare it with ease and ease-in-out, start from a preset and copy the value.

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Text

8 tools

Working with plain text: compare two versions and see what changed, change its case, count its words and characters, restyle it with Unicode into fancy or glitched text, draw it as ASCII art, copy kaomoji text faces, and test how fast you type it, prose or code.

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Case Converter: camelCase, snake_case and Title Case

Convert text to camelCase, snake_case, kebab-case, Title Case, UPPER CASE and more in your browser. Handles acronyms and numbers, and uploads nothing.

Open toolAbacus icon

Word Counter and Character Counter

Count words, characters, sentences and paragraphs as you type, with reading time, keywords and X post limits. Handles emoji and Chinese, and uploads nothing.

Open toolBalance scale icon

Diff Checker: Compare Two Texts Online (Text Compare)

Compare two texts online and see the differences, with changed words highlighted, side by side or inline. Ignore whitespace or case. Nothing is uploaded.

Open toolSparkles icon

Fancy Text Generator: Cool Fonts to Copy and Paste

Make fancy text for Instagram, TikTok and X bios: bold, italic, script, bubble, small caps and upside down to copy and paste. Runs in your browser.

Open toolPixel alien monster icon

Glitch Text Generator: Zalgo and Cursed Text to Copy

Make glitch text, also called zalgo or cursed text, to copy and paste. Set the intensity and which way the marks go. Runs in your browser.

Open toolGrinning cat face icon

Kaomoji: Japanese Text Faces to Copy and Paste

Copy and paste kaomoji and Japanese text faces: cats, happy, sad, love, table flip, shrug and the lenny face. Search by mood and tap to copy.

Open toolPaintbrush icon

ASCII Art Generator: Text to ASCII Art with FIGlet Fonts

Turn text into ASCII art with FIGlet fonts like Standard, Slant and ANSI Shadow. Copy it or download a .txt, with a terminal width check. Runs in your browser.

Open toolKeyboard icon

Typing Speed Test: WPM Test for Text and Code

Test your typing speed in WPM with accuracy, in 15, 30 or 60 seconds. Code Mode is a typing test for programmers with JavaScript and Python. Works on phones.

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Generators

6 tools

Making the values developers need mid-task: random and time-sorted UUIDs in bulk, strong passwords and passphrases with their entropy shown, MD5 and SHA hashes and HMACs of text or files, .gitignore files built from templates, cron expressions built or explained in plain English with their next run times, and favicon sets drawn from an image, text or an emoji.

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UUID Generator: Random v4 and Time-Sorted v7 UUIDs

Generate random v4 or time-sorted v7 UUIDs (GUIDs), one or up to 1,000 at once, and copy or download them. Paste a UUID to check it and see its version.

Open toolKey icon

Password Generator: Strong Passwords and Passphrases

Generate a strong random password or passphrase in your browser. Pick the length and characters, see its entropy in bits, and copy it. Nothing is uploaded.

Open toolHash symbol icon

Hash Generator: MD5, SHA-256 and SHA-512 Online

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes of text or a file, with optional HMAC. Compare a checksum to check a download. Nothing is uploaded.

Open toolSee-no-evil monkey icon

.gitignore Generator: Templates for Node, Python and More

Generate a .gitignore file for Node, Python, .NET, Unity or any mix of 70 languages, frameworks, editors and OSes. Copy or download it. Nothing is uploaded.

Open toolAlarm clock icon

Cron Expression Generator: Build and Explain Crontab Schedules

Build a cron expression from dropdowns or paste one to explain it in plain English, with the next 5 run times in your time zone. Nothing is uploaded.

Open toolStar icon

Favicon Generator: Create favicon.ico and Apple Touch Icons

Create a favicon from an image, text or an emoji. Download favicon.ico, PNGs, an apple-touch-icon and the HTML tags in one zip. Nothing is uploaded.

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On the list: JWT decoder, URL encoder. Want one of them sooner? Tell us.