utilpeek (Tanod) US Treasury daily par yield curve, 1 Mo to 30 Yr, for any date since 1990.

utilpeek (Tanod) user agent: browser, OS and device from a User-Agent string, plus a bot heuristic.

utilpeek (Tanod) identifier check: format and check digits only, of an IBAN, BIC, EU VAT, ISBN, ISSN, EAN, ISIN, LEI, IMO or a national tax/business ID; not an existence or registration check (no registry or VIES call). Payment card numbers are not accepted.

utilpeek (Tanod) URL parsing: parts, IDNA forms and the public-suffix split (bundled PSL snapshot 2025-04-07); the URL is never fetched.

utilpeek (Tanod) time zones: one instant converted to up to 20 IANA time zones (offsets, DST).

utilpeek (Tanod) find and replace: literal or RE2 regex (linear time).

utilpeek (Tanod) text statistics: counts, reading time and English readability scores of a text.

utilpeek (Tanod) sentiment: VADER compound score and label (English).

utilpeek (Tanod) color conversion (hex, RGB, HSL, HSV, CMYK, OKLCH) and WCAG 2.x contrast check (AA / AAA).

utilpeek (Tanod) identifiers: UUID v4, UUID v7 or ULID.

pdfpeek (Tanod) PDF attachments: list, extract or add the files embedded in a PDF.

pdfpeek (Tanod) PDF repair: a damaged file rebuilt, optionally linearized for fast web view.

pdfpeek (Tanod) PDF bookmarks: the outline written from a nested JSON tree.

utilpeek (Tanod) business days: count working days between two dates or add N working days, with custom weekends and public holidays for 250 countries.

utilpeek (Tanod) HMAC: sign a message or verify a webhook signature (sha256, sha512 or sha1).

utilpeek (Tanod) unit conversion with exact factors: length, mass, temperature, volume, area, speed, pressure, energy, power, data size, time, fuel economy.

pdfpeek (Tanod) PDF form fields: names, types, values, options and required flags.

pdfpeek (Tanod) PDF form fill: fields set from a JSON object, appearances drawn, optional flatten.

pdfpeek (Tanod) PDF flatten: form fields and annotations merged into the page content.

mlpeek (Tanod) speech to text and subtitles: an audio file of up to 10 minutes as text, timed segments, SRT and WebVTT (faster-whisper). Use when an agent must turn a spoken-audio file of up to 10 minutes into text, timed segments or SRT captions.