Encoding & Conversion
5Base64 Encoder / DecoderEncode text to Base64 and decode it back through UTF-8 bytes so Chinese, emoji and other Unicode characters survive the round trip, with copy and result feedback.URL Encoder / DecoderPercent-encode and decode URLs and query parameters in both encodeURIComponent and encodeURI modes, correctly escaping Chinese and spaces, with friendly errors on malformed sequences.Base ConverterConvert integers between binary, octal, decimal, hexadecimal and any base from 2 to 36, using digits 0-9 then letters a-z, with a live common-base reference table.HTML Entity Encoder / DecoderConvert characters to and from HTML entities: named ones (amp, lt, gt, quot) and numeric hex entities, with non-ASCII auto-escaped and a per-character mapping table.Unicode Escape Encoder / DecoderConvert characters to and from uxxxx escapes, splitting emoji and other supplementary-plane characters into correct surrogate pairs, with per-character code point, UTF-8 bytes and UTF-16 units.
Developer Tools
4JSON FormatterFormat, minify and validate JSON in the browser, pretty-printing with two-space indentation, pointing at the exact line, column and snippet on error, with object and array structure stats.Regex TesterTest regular expressions live with match highlighting and hit count, capture groups shown per match, flags global, case-insensitive, multiline and more, plus built-in email and phone examples.UUID GeneratorGenerate RFC 4122 version-4 UUIDs locally in the browser with crypto.randomUUID, from 1 to 20 at a time, uppercase or lowercase, hyphens optional, copy one or all.Hash GeneratorCompute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 digests of text or a local file live, with one-click copy and uppercase toggle, for file checksums and integrity verification.
Generators
2Password GeneratorGenerate strong random passwords locally in the browser, length 4 to 128, with selectable upper or lower letters, digits and symbols, live entropy and strength rating, up to 10 at once.QR Code GeneratorGenerate a QR code from any text, link or phone number, with adjustable size, margin, error-correction level and foreground or background colors, live preview and one-click HD PNG download.
Text Processing
3Case ConverterConvert any text to eight casings at once: UPPERCASE, lowercase, Title Case, sentence case, camelCase, PascalCase, snake_case and kebab-case, each with its own copy button.Character CounterCount characters with or without spaces, words, lines, paragraphs and UTF-8 bytes live as you type, with built-in targets like Weibo 140 or Twitter 280 and a remaining-characters counter.Markdown PreviewWrite Markdown on the left and render it live on the right, with GFM tables, fenced code blocks and strikethrough, plus a view and one-click copy of the generated HTML source.
