FindUtils

• Invoice Generate — Generate a professional PDF invoice. Returns a base64-encoded PDF. Supports line items, tax, discounts, notes, and full sender/recipient details.
• A2ui Spec — Returns A2UI protocol documentation for a given spec version and section. Sections: protocol, components, data-binding, actions, catalogs, custom-functions, renderers, renderer-contract, transports, mcp-apps, agents, sdk-architecture, ecosystem. Use this when authoring A2UI payloads to get authoritative reference material without guessing.
• A2ui Basic Catalog — Returns the authoritative basic-catalog JSON Schema (components, functions, theme) for the requested A2UI version. Use this to validate agent output or bootstrap a custom catalog.
• A2ui Examples — Returns one or more canonical A2UI JSONL examples matching a pattern (form, list, wizard, modal, chat, dashboard, checkout, typeahead, mcp-card, multi-surface, theme-*). Use these as few-shot examples when prompting an LLM to generate A2UI.
• A2ui Diff — Computes a structural diff between two A2UI JSONL payloads: surfaces added/removed, components added/removed/changed (by id), data-model path-level changes. Use this to understand what an agent turn changed in a surface, or to verify that a refactor kept behaviour identical.
• A2ui Prompt — Generates a drop-in LLM system prompt that teaches the model to output valid A2UI JSONL: includes the basic-catalog component / function list, the hard rules (one root, IDs not inline, paths start with "/"), and the requested few-shot examples. Feed the returned string straight into your chat-completion call's system role.
• A2ui Validate — Validates a JSONL A2UI payload against the basic catalog (or a custom catalog) and returns any errors, warnings, or info messages with exact line numbers. Call this on every LLM-generated payload before sending to the client.
• Pdf Extract — PDF Text Extractor. Extract text and structured JSON (with bounding boxes) from a PDF. Accepts either a public https:// URL pointing to a PDF, or a base64-encoded PDF string. Runs entirely on Cloudflare Workers via WebAssembly — the bytes are not logged. Best for documents under 10MB.
• Age Calculate — Calculate age from a date of birth — years, months, days, plus totals in days, weeks, and months. Accepts ISO 8601 or anything Date.parse handles.
• Ai Model Picker — Return the best-matching AI coding models (top 3 by default) for a project, scored on speed, accuracy, cost and context window from four answers: what you build, primary language, top priority and project complexity. Model data comes from the live FindUtils model catalog.
• Amortization Calculator — Return a full loan amortization schedule (one row per month with payment, principal, interest, extra payment, balance) plus totals, interest saved, months saved, and the payoff month. Rate is a yearly percentage; payments are monthly.
• Api Docs Generator — Return API documentation generated from a list of endpoints, as Markdown (with table of contents, request/response examples) or as an OpenAPI 3.0.3 JSON specification.
• Aspect Ratio — Compute the aspect ratio of width:height. Optionally scale to a new width or height.
• Ass To Srt — Flatten an Advanced SubStation Alpha (.ass) or SubStation Alpha (.ssa) subtitle script to plain SubRip (.srt). Reads the Dialogue lines of the [Events] section using the Format line for column order, converts H:MM:SS.cc centisecond timestamps to HH:MM:SS,mmm, strips every {\...} override block, turns \N into a line break, sorts cues by start time and renumbers them from 1. Styles, fonts, colours, positioning and drawing commands are discarded on purpose, because SubRip cannot carry them. Comment
• Attendance Sheet Generator — Generate a blank attendance sheet for a list of students over consecutive days and return the date columns, a CSV, a Markdown table, and a plain-text grid. Dates are consecutive calendar days from start_date (UTC), labelled like "Mon, Mar 2".
• Auto Loan Calculator — Return the monthly car payment, total interest, financed amount, and a month-by-month amortization schedule for an auto loan. Accounts for down payment, trade-in value, and sales tax (optionally financed). Rate is a yearly percentage.
• Barcode Generator — Generate a 1D barcode as an SVG string from text. CODE128 takes any printable ASCII, CODE39 takes A-Z, 0-9, space and -.$/+%. EAN13, EAN8 and UPC (UPC-A) take digits: give 12, 7 or 11 digits and the GS1 check digit is appended, or the full code and it is verified. Returns the SVG, the bar/space bit pattern, the printed text, and the image size.
• Base32 Decode — Decode RFC 4648 base32 back to UTF-8 text. Case-insensitive; padding "=" optional.
• Base32 Encode — Encode UTF-8 text to RFC 4648 base32 (uppercase, "=" padding). Useful for TOTP secrets and case-insensitive identifiers.
• Base64 Decode — Decode a base64 string back to UTF-8 text.
• Base64 Encode — Encode UTF-8 text as a base64 string.
• Bmi Calculate — Compute Body Mass Index (BMI) with metric (kg/cm) or imperial (lb/in) units.
• Body Fat Calculator — Estimate body fat percentage, fat mass, lean mass, BMI, and a body-composition category. Four methods: the U.S. Navy circumference method (waist, neck, hip), a BMI-based estimate (Deurenberg), and the Jackson-Pollock 3-site and 7-site skinfold equations with Siri conversion. Metric (kg/cm) or imperial (lbs/in) inputs; skinfolds are always millimetres.
• Bookmarks Diff — Compare two Netscape bookmarks.html exports (before and after) and list the links that were added, removed, or changed. Links are matched by address the way dedupe_bookmarks compares them: host case, default port and trailing slash folded, and by default utm_* / fbclid / gclid parameters and the #fragment ignored. A match is "changed" when its title differs or, with compare_folders (default true), when it sits in a different folder. Returns counts, one entry per difference, a CSV report, and the
• Bookmarks Html To Csv — Convert a browser bookmarks.html export from Chrome, Firefox, Edge, Safari or any other browser that writes the Netscape bookmark format into CSV, one row per link. Each row carries the folder path flattened with " / ", the title, the URL, and the ADD_DATE and LAST_MODIFIED stamps as ISO-8601 when the export has them. Favicon data stored in the ICON attribute is never written to the CSV and no favicon is ever fetched. Nothing is checked against the network, so a dead link is reported exactly as

Showing the first 25 tools — full list and schemas: Directory API.