Character & byte counter
Count Unicode characters, words, lines and UTF-8 bytes as you type.
TextOpen
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Text, calculations and data conversions. Just you and your browser.
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Your pinned workbench
Your favorites, ready to usePercentage calculator
Calculate a percentage of a number, percentage change, or percentage-point difference.
NumbersOpen
Date calculator
Find days between dates or add and subtract days, with an explicit inclusive option.
NumbersOpen
YAML to JSON converter
Convert YAML locally with preserved source, useful error locations and type-inference warnings.
Code & dataOpen
JSON formatter & validator
Validate, format and minify JSON with line/column errors, copy and file download.
Code & dataOpen
Discount calculator
Find the saving and final price from an original price and discount rate.
NumbersOpen
VAT calculator
Add VAT to a net amount or extract net price and tax from a gross amount.
NumbersOpen
Margin & profit calculator
Calculate profit, margin and markup after a percentage-based sales fee.
NumbersOpen
Unit price calculator
Compare pack prices using cost per item or a reference quantity such as 100 grams.
NumbersOpen
Average & median calculator
Find mean, median, sum, minimum and maximum for a list of numbers.
NumbersOpen
Ratio simplifier
Reduce two whole numbers to their simplest ratio using exact integer arithmetic.
NumbersOpen
Length, area, mass & temperature converter
Convert compatible length, area, mass and temperature measurements.
NumbersOpen
Number base converter
Convert integers between bases 2–36 without losing large-number precision.
Code & dataOpen
Unix timestamp converter
Convert Unix seconds or milliseconds to and from explicit-zone ISO dates.
Code & dataOpen
Base64 text encoder & decoder
Encode and decode UTF-8 text, including Korean and emoji, as standard Base64.
Code & dataOpen
URL encoder & decoder
Encode URL components or decode percent escapes with UTF-8 validation.
Code & dataOpen
HTML entity encoder & decoder
Encode special characters as HTML entities or decode named and numeric references.
Code & dataOpen
Case & naming converter
Transform text to uppercase, lowercase, title, camel, Pascal, snake or kebab case.
TextOpen
Line sorter & duplicate remover
Deduplicate or sort lines, remove blank lines, trim edges and add line numbers locally.
TextOpen
URL slug generator
Create readable slugs by normalizing titles, removing punctuation and retaining Unicode letters.
TextOpen
Secure password generator
Generate passwords locally using cryptographic randomness and selected character groups.
Code & dataOpen
UUID v4 generator
Generate one or more random UUID v4 identifiers entirely in your browser.
Code & dataOpen
SHA hash generator
Compute SHA-256, SHA-384 or SHA-512 digests of text or a local file without uploading.
Code & dataOpen
JSON to CSV converter
Convert a JSON object array to CSV with combined columns and spreadsheet formula escaping.
Code & dataOpen
CSV to JSON converter
Parse quoted commas and multiline CSV cells into a JSON array of objects.
Code & dataOpen
JSON to YAML converter
Convert valid JSON to readable YAML 1.2 with appropriate scalar quoting.
Code & dataOpen
Structural JSON diff
Compare JSON values structurally and locate additions, removals and replacements.
Code & dataOpen
HEX, RGB & HSL color converter
Convert color codes including alpha and preview the resulting color.
Code & dataOpen
Static QR code generator
Create a static QR image from text or a URL, with no service-managed expiration.
Images & QROpen
Image resize & compression
Resize PNG, JPEG or WebP images and change format/quality entirely on your device.
Images & QROpen
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