Tools tagged "generate"

Synthesise white, pink and brown (red) noise in your browser with live playback and WAV download. **White** has flat energy across frequency (sounds bright). **Pink** has flat energy per octave (1/f spectrum, close to many natural sounds). **Brown** falls off at -6 dB/octave for a deep, ocean-like sound. Useful as a focus-aid masking track, infant sleep aid, tinnitus relief, or as a test signal for audio equipment. Download any duration from 0.5 s to 60 s as 44.1 kHz / 16-bit / mono WAV. Runs entirely in your browser — nothing is uploaded.

Free online 1D barcode generator. Create EAN-13 / EAN-8, UPC-A, Code 128, Code 39, ITF, Codabar (NW-7), MSI, JAN barcodes from numbers or text and export as PNG or SVG. Tune bar width, height, color, margin, and human-readable label. Check digits validated automatically. Everything is generated inside your browser — the value you enter never leaves your device.

Build CSS box-shadow and text-shadow visually. Toggle box / text mode and tune offset-x, offset-y, blur, spread (box only), color, and inset (box only) with sliders and number inputs. Stack multiple shadows for layered Material-style elevation, Neumorphism, text outlines, neon glows, and retro overlap — 9 presets to start. Live preview on a real div or real heading, plus a one-click copy as raw value or full CSS declaration. Pair with gradient-css for the full CSS-style trio. Runs entirely in your browser.

Roll TTRPG / board-game dice using familiar notation: 2d6+3, 1d20-2, 4d6kh3 (keep highest 3), 3d6+1d4-1, and more. Randomness uses the Web Crypto API (crypto.getRandomValues with rejection sampling) for an exactly uniform distribution. Comes with one-click presets (d4 / d6 / d8 / d10 / d12 / d20 / d100 / 3d6 / 4d6kh3, …) and an in-browser history of the last 20 rolls. Nothing is uploaded.

Build cubic-bezier() timing functions for CSS transitions and animations with three synced views: an SVG preview curve with draggable control points, a numeric slider/input pair per coordinate, and a one-click library of presets (ease / ease-in / ease-out / ease-in-out, Material-style cubics, back/overshoot). A live motion preview (a bar that travels end-to-end) shows the actual feel. Output is the cubic-bezier(...) value or a ready-to-paste transition-timing-function declaration. Runs entirely in your browser.

Tokenises Japanese text with kuromoji and wraps each kanji token in `<ruby>漢字<rt>かんじ</rt></ruby>` markup. Copy the source and paste it into WordPress, any CMS, or a Markdown article. Furigana can be hiragana or katakana, with optional `<rp>` fallback for non-ruby browsers. Runs entirely in your browser.

Build CSS linear-gradient / radial-gradient / conic-gradient in the browser with a Mode-first picker. Add or remove color stops with live preview, tweak angle (linear / conic), shape and extent (radial), and center position (radial / conic). Copy as a full `background: …` declaration or just the value — both work straight into Tailwind arbitrary values like `bg-[linear-gradient(...)]`. Everything renders client-side; nothing is uploaded.

Generate SHA-1, SHA-256, SHA-384, and SHA-512 digests from text in parallel. Powered by the Web Crypto API and runs entirely in your browser.

Generate a full favicon / PWA / Apple Touch / Android Chrome icon set (16–512px PNGs) plus a multi-size favicon.ico from a single source image, then download them as a ZIP. Canvas handles the resize and the ICO binary is built locally — your image never leaves your browser.

Drop your image and add classic Impact-style top and bottom captions in white with a black outline — the legendary internet meme look. Adjust font size, fill colour, outline colour and outline width, force uppercase, and let long captions wrap automatically (per-word for English, per-character for Japanese). Export as PNG, JPEG or WebP. Pure Canvas implementation with a font fallback chain (Impact → Anton → Oswald → Arial Black). Your image stays in your browser — never uploaded.

A browser-only interval timer for HIIT (High-Intensity Interval Training) and Tabata (20 s work / 10 s rest × 8 rounds). Configure warm-up, work, rest, cool-down and rounds in seconds, with the current phase / remaining time / round progress shown live. Settings autosave to localStorage. Phase transitions trigger short Web Audio beeps (work start = high 880 Hz, rest start = low 440 Hz, finished = chord), and the final 3 seconds add an optional countdown tick. One-click presets: Tabata (20/10 × 8), HIIT 30/30, HIIT 45/15, HIIT 40/20. Uses `performance.now()` deltas so transitions stay accurate in throttled background tabs. Timer logic and audio all run inside your browser — nothing is uploaded.

Generate (sign) a JWT (JSON Web Token) entirely in your browser using the Web Crypto API. Supports HS256 / HS384 / HS512 (HMAC), RS256 / RS384 / RS512 (RSASSA-PKCS1-v1_5), PS256 / PS384 / PS512 (RSA-PSS), and ES256 / ES384 / ES512 (ECDSA P-256/P-384/P-521). Provide Header / Payload as JSON (with optional auto-fill for `exp` / `iat` / `nbf`), and a key — a string for HMAC, or a PKCS#8 PEM / JWK for asymmetric. Output is the standard `header.payload.signature` JWT which can be pasted straight into jwt-decode / jwt-verify. Secrets and payloads stay in your browser.

Generate placeholder text for mockups, wireframes, and tests entirely inside your browser. Supports English Lorem ipsum and a Japanese variant. Pick the number of paragraphs and sentences per paragraph, then copy or download in one click — no API calls.

Scan Markdown headings (#, ##, …) and emit a table of contents with GitHub-style anchor links. Toggle between nested and flat list, change the maximum heading level, and choose whether to include H1. Headings inside fenced code blocks are skipped automatically. Copy the Markdown or save as .md and paste it anywhere. Runs entirely in your browser.

Generate strong random passwords in batches of 1–25. Pick length, character sets, and toggle look-alike exclusion. Backed by crypto.getRandomValues and runs entirely in your browser.

Generate **pronounceable** passwords by alternating **consonant + vowel** so the result reads as syllables — `Karipo23`, `MofeJivo` — much easier to remember than `x7@K!w`. Configurable length (4–32 chars), 0–4 trailing digits, optional symbol suffix, optional capitalisation of every syllable's first letter. Uses **`crypto.getRandomValues`** under the hood for cryptographically strong randomness and displays the entropy (search-space bits) for each password. Generate up to 50 candidates at once and pick the one you like.

A browser-only Pomodoro timer for focused work cycles: 25 minutes work + 5 minutes short break, then a 15–30 minute long break every fourth pomodoro. Customise work / short-break / long-break minutes, number of cycles and the audio chime — settings autosave to localStorage. Phase-end chimes are synthesised with the Web Audio API (descending for work-end, ascending for break-end, a C-major chord for set-end). Uses `performance.now()` deltas so transitions stay accurate even in throttled background tabs. Timer logic, settings and audio all run inside your browser — nothing is uploaded.

Convert text or URLs into QR codes (PNG / SVG). Fine-tune size, error correction level, foreground / background colors, and optionally overlay a logo (PNG / JPG / SVG) in the center. Use error correction H when adding a logo. Generation and image compositing run entirely inside your browser — neither the input text nor your uploaded logo ever leaves your device.

Turn titles and headings into URL-safe slugs (kebab-case or snake_case). Diacritics (é → e) are normalised to ASCII, emoji and punctuation are stripped, and whitespace is collapsed into the separator. Configurable length cap, case preservation, and non-ASCII handling — all in your browser.

Type a name (1–4 Japanese characters) and generate a 朱印 (Japanese name-seal) style PNG with Canvas. Choose a round / square / oval shape, a font (mincho / gothic / round-gothic), and a color (vermilion / black / navy). Transparent PNG works as a placeholder signature for e-documents, a casual avatar, or a heading flourish. Four-character names use the traditional 田 layout (top-right → top-left → bottom-right → bottom-left). Note: this is a decorative image — it does not replace a real hanko for legal contracts. Everything is rendered in your browser.