Inspect UTF-8 hex bytes, copy mathematical Unicode symbols, test regular expressions, decode JWTs, and verify WCAG contrast.
Copy-ready mathematical operator characters (±, ×, ÷, √, ∞, ≈, ≠, ≡, ≤, ≥, ∑, ∏, ∂, ∇, ∫) with UTF-8 hex bytes, HTML entities, and CSS escapes.
Complete uppercase and lowercase Greek letters used across physics, mathematics, statistics, electrical engineering, and quantitative finance.
Cardinal, diagonal, bidirectional, logical implication, functional mapsto, and chemical equilibrium arrows with HTML entities and UTF-8 hex.
Global ISO monetary symbols and Bitcoin U+20BF glyph with exact HTML entities, CSS hex escapes, and UTF-8 byte encodings.
Single-line, double-line, heavy, and shaded block characters (U+2500–U+259F) for ASCII/ANSI diagrams, TUI layouts, and monospace architecture trees.
Plain-text exponent superscripts and chemical/index subscripts that survive clipboard copy into Markdown, plain text, titles, and axis labels.
Precomposed vulgar fractions (halves, thirds, quarters, fifths, sixths, eighths) and canonical Roman numeral code points.
Filled, outlined, half-shaded, and quadrant geometric primitives (U+25A0–U+25FF) for chart legends, UI badges, and technical notation.
Command (⌘), Option (⌥), Control (⌃), Shift (⇧), Return (⏎), Power, electrical ground, and mechanical GD&T tolerance symbols.
Copy-ready validation ticks, ballot boxes, rating stars, status dots, and ISO warning/hazard symbols.
Predicate logic quantifiers, turnstiles, set membership/inclusion operators, and double-struck number domain symbols (ℕ, ℤ, ℚ, ℝ, ℂ).
Single, multiple, contour, surface, and volume integrals alongside partial derivatives, primes, nabla, and Dirac/Planck constants.
Precision typographic dashes, curly quotation marks, guillemets, section/pilcrow marks, daggers, and basis-point symbols.
Quarter/eighth/beamed notes, flat/natural/sharp accidentals, and transport symbols with exact code points and entities.
Meteorological glyphs, classical planetary symbols, and zodiac/celestial coordinate markers in Unicode U+2600–U+2653.
White and black algebraic chess figurines, four card suits, and 6-sided die faces (⚀–⚅) for probability and game notation.
Bit-mapped Unicode Braille cells (⠀ through ⣿) used for accessibility research AND high-resolution terminal sparklines/plots.
Core IPA vowel and consonant glyphs (U+0250–U+02AF) for linguistics, dictionaries, TTS phoneme prompts, and pronunciation guides.
Step-by-step callout badges (①, ②, ③...) and circled uppercase letters from Enclosed Alphanumerics (U+2460–U+24FF).
Classic typographic dingbats, drafting nibs, four-pointed stars, and geometric rosettes in U+2700–U+27BF.
Accented European Latin characters with named HTML entities (`é`, `ñ`, `ü`, `ß`) and 2-byte UTF-8 hex codes.
Uppercase and lowercase Cyrillic script characters with hexadecimal code points and 2-byte `D0/D1` UTF-8 encodings.
Right-to-left Hebrew letters and Arabic typographic marks for bidirectional (`dir='rtl'`) layout testing and Unicode BiDi debugging.
East Asian corner brackets, lenticular brackets, ideographic comma/full-stop, and Kangxi/CJK typographic marks (U+3000–U+303F).
Paste any text, emoji, or mathematical formula to inspect every scalar code point, UTF-8 byte sequence, UTF-16 surrogate pair, and byte length.
Inspect decimal code points, `U+XXXX` hex scalars, ES6 `\u{...}` escapes, and UTF-16 surrogate pairs for any pasted string.
Compare visual grapheme clusters (`Intl.Segmenter`), Unicode code points, UTF-16 `.length`, and exact UTF-8 byte count side-by-side.
Encode and decode Base64 strings cleanly with full multi-byte UTF-8 support (`TextEncoder` + RFC 4648) — zero `btoa` Latin-1 crashes.
Convert text and tokens to URL- and filename-safe Base64URL (`-` and `_` instead of `+` and `/`, unpadded) used in JWTs, OAuth PKCE, and WebAuthn.
Encode and decode URI components, query parameters, and UTF-8 paths per RFC 3986 with side-by-side `encodeURI` vs `encodeURIComponent` behavior.
Decode URL query payloads, inspect escaped UTM/API parameters, and re-encode clean RFC 3986 strings.
Escape `<`, `>`, `&`, quotes, and non-ASCII Unicode characters into HTML entities (`&#xXXXX;` / `&#NNNN;`) or decode entity strings back to clean text.
Convert symbols and strings into CSS `content: '\XXXX'` escapes and hexadecimal HTML entities for `::before` / `::after` pseudo-elements.
Instant BigInt-precision base conversion across Binary (base 2), Octal (base 8), Decimal (base 10), and Hexadecimal (base 16) with nibble grouping.
Evaluate bitwise `A & B`, `A | B`, `A ^ B`, `~A`, `A << k`, and `A >> k` simultaneously across Decimal, Hex, and 32/64-bit Binary.
Inspect integer bit patterns, hex words, nibble groupings, and power-of-two boundaries for low-level systems and embedded debugging.
Pretty-print, validate RFC 8259 JSON syntax with exact line/character error diagnostics, sort object keys deterministically, or minify payloads.
Test JavaScript/ECMAScript regular expressions with live flags (`g`, `i`, `m`, `s`, `u`), match indices, and numbered/named capture group breakdowns.
Decode JWT `header.payload.signature` segments instantly with automatic `exp`, `iat`, and `nbf` human-readable timestamp formatting.
Compute hardware-accelerated cryptographic message digests (`SHA-256`, `SHA-384`, `SHA-512`, `SHA-1`) in Hex and Base64 via native `crypto.subtle`.
Calculate exact relative luminance `L` and WCAG `(L₁ + 0.05) / (L₂ + 0.05)` contrast ratios with live normal-text, large-text, and UI component pass/fail badges.
Searchable 128-row ANSI X3.4 / RFC 20 ASCII table (`0x00 NUL` to `0x7F DEL`) in Decimal, Hexadecimal, Octal, 8-bit Binary, and caret notation.