Free online tools
Small utilities for everyday jobs. They run in your browser, so the text and data you enter never leave your device.
Text
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Word Counter
Count words, characters, sentences and paragraphs, and estimate reading and speaking time.
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Text Case Converter
Switch text between upper case, lower case, title case, sentence case and common code styles.
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Duplicate Line Remover
Remove repeated lines from lists without scrambling their original order.
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Whitespace Cleaner
Standardize line endings, indentation and blank lines in pasted text.
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Line-by-Line Text Diff
Compare two passages and show added, removed and unchanged lines.
Developer
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JSON Formatter & Validator
Format, minify and validate JSON, with the line and column of the first error.
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Base64 Text Encoder / Decoder
Encode UTF-8 text as Base64 or decode Base64 back to readable text.
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URL Component Encoder / Decoder
Encode or decode URL query values and path components safely.
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HTML Escape / Unescape
Convert HTML special characters into safe entities and decode common entities.
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Unix Timestamp Converter
Translate Unix timestamps and ISO date-times into UTC and local time.
Security
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Secure Password Generator
Create a random password in your browser. Choose the length and the kinds of characters.
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Password Pattern Checklist
Spot basic weak password patterns locally, without sending a password anywhere.
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SHA-2 Hash Generator
Compute SHA-256, SHA-384 or SHA-512 digests of text in your browser.
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Random Passphrase Generator
Create multiword passphrases with secure browser randomness.
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Sensitive Data Redactor
Mask likely emails, phone numbers and IPv4 addresses in pasted text.
Design
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HEX / RGB Color Converter
Convert colours between HEX, RGB and HSL, preview them, and check text contrast.
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Analogous Color Palette Generator
Generate five coordinated HEX colors from a single base hue.
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Two-Color Contrast Checker
Check WCAG contrast between any foreground and background HEX colors.
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CSS Linear Gradient Builder
Build and preview a two-color CSS gradient with angle and stops.
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CSS Box Shadow Builder
Preview and generate a CSS shadow with blur, offset, spread and opacity.
SEO
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Meta Title & Description Preview
Draft a page title and meta description and see an approximate search-result snippet.
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SEO-Friendly URL Slug Generator
Turn a title into a concise lowercase URL slug, including Unicode letters.
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Robots.txt Rule Builder
Draft robots.txt Allow and Disallow rules and a sitemap line.
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UTM Campaign URL Builder
Add consistent utm_source, utm_medium and utm_campaign tags to a URL.
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FAQ JSON-LD Schema Generator
Generate valid FAQPage JSON-LD markup from up to three question-answer pairs.