All Tools_

Prettify, validate, and minify JSON payloads instantly.

Pretty-print and indent XML documents.

Reformat messy HTML with consistent indentation.

Format or minify CSS without touching the whitespace that is grammar.

Reformat minified or messy JavaScript, and know what cannot come back.

Format SQL queries with keyword casing and indentation.

Re-indent and validate YAML without losing your comments.

Strip whitespace from JSON, and see what it actually saved.

Compress CSS and see the saving after gzip, not before.

Minify JavaScript through a real parser, and see which switch is risky.

Compress HTML markup without collapsing whitespace the browser renders.

Collapse SQL queries to a single compact line.

Write Markdown with a live rendered preview.

Convert epoch timestamps to readable dates and back.

Convert JSON to YAML, quoting the values YAML would otherwise reinterpret.

Convert YAML to JSON, with a report of everything the conversion cost.

Flatten JSON arrays into CSV rows.

Turn CSV rows into JSON objects.

Convert XML to JSON with the mapping shown, not guessed.

Convert JSON to XML, with a report of what the target had to change.

Convert Markdown to sanitised HTML, with the flavour stated.

Extract a PDF into Markdown, with its structure inferred and reported.

Convert HTML back to Markdown, with an account of what was lost.

Convert base-2 numbers to decimal.

Convert decimal numbers to base-2.

Convert hexadecimal values to decimal.

Convert decimal numbers to hexadecimal.

Decode binary byte sequences into text.

Encode text as binary byte sequences.

Convert HEX color codes to RGB values.

Convert RGB values to HEX color codes.

Convert OKLCH colors to HEX codes.

Convert HSL colors to HEX codes.

Convert data sizes in decimal and binary at once, and see why they disagree.

Calculate dimensions that keep an aspect ratio.

Encode text to Base64, UTF-8 safe.

Decode Base64 back to readable text.

Percent-encode text for safe use in URLs.

Decode percent-encoded URL strings.

Decode JSON Web Tokens without sending secrets anywhere.

Escape text into HTML entities, or decode them back.

Decode HTML entities, and see how many times they were encoded.

Escape a string as a source-code literal for fifteen languages.

Escape and unescape Unicode sequences.

Convert strings to hex byte values and back.

Encode, decode, or break a Caesar shift without the key.

Apply the ROT13 letter-substitution cipher.

Convert internationalized domains to Punycode and back.

Generate cryptographically strong unique identifiers.

Create strong random passwords with custom rules.

Generate memorable multi-word passphrases with the entropy shown as arithmetic.

Compute MD5 and every SHA digest for text or a file, and compare a checksum.

Compute the MD5 of text or a file, and verify a published checksum.

Compute SHA-256 and HMAC-SHA256 for text or a file, and verify a checksum.

Generate and verify bcrypt password hashes, with the cost factor timed.

Generate placeholder text at any length.

Generate random numbers in a custom range.

Turn any title into a clean URL slug, with accents mapped rather than stripped.

Create QR codes for URLs, Wi-Fi, contacts, and more.

Read a cron expression in English and see when it next fires.

Generate valid random MAC addresses, and read the flags in any address.

Create htpasswd entries for basic auth.

Build and sign test JSON Web Tokens, with the missing claims flagged.

Generate random API keys and secrets.

Infer a JSON Schema from a sample document.

Generate fake JSON from a seed, so the same fixture comes back.

Compare two texts and highlight differences.

Test regular expressions against sample text live.

Switch text between upper, lower, title, and camel case.

Count characters, words, and sentences.

Count lines in any block of text.

Count words, characters, and reading time as you type.

Delete duplicate lines from a list.

Sort lines alphabetically or numerically.

Find and replace many pairs at once, in a single pass.

Strip extra spaces, tabs, and blank lines.

Escape and unescape JSON strings.

Query JSON documents with JSONPath expressions.

Compare two blocks of text side by side.

Generate SEO meta tags for any page.

Build Open Graph tags and see how six platforms will render them.

Compose a valid robots.txt file.

Generate .htaccess redirect rules.

Build campaign URLs with UTM parameters.

Parse user agent strings into browser and OS details.

Look up every HTTP status code and its meaning.

Look up MIME types by file extension.

Convert Unix permissions between symbolic and octal, with the risk spelled out.

Design CSS gradients visually.

Design CSS box shadows visually.

Preview and tune CSS border radius.

Experiment with flexbox layouts visually.

Create favicon.ico and PNGs in every required size.