castomAPI
Get your key

Convert, generate & parse · 13 operations

Convert API

Currencies, colours, coordinates, timestamps, data formats, encodings, numerals, casing — one call each.

Utilities 1 token API key

Endpoints in Convert

POSTEncode raw text/hex to Base64/Base64URL or decode Base64 strings back…/v1/convert/base64free POSTConvert text and code identifiers across 14 string casing conventions…/v1/convert/casefree POSTConvert colors across HEX/v1/convert/colorfree POSTConvert cryptocurrency and on-chain balances/v1/convert/crypto-unitsfree POSTConvert real-time currencies/v1/convert/currency1 token POSTConvert structured data seamlessly between JSON/v1/convert/data-formatfree POSTEncode, decode, and transform data across Base64/v1/convert/encodingfree POSTConvert coordinates across Decimal Degrees (DD)/v1/convert/geofree POSTConvert raw HTML or scraped web content into clean Markdown for AI /…/v1/convert/html-to-markdownfree POSTConvert IP addresses across Dot-Decimal/v1/convert/network-ipfree POSTConvert arbitrary-precision integers across Binary/v1/convert/numeralsfree POSTConvert timestamps/dates across timezones/v1/convert/timefree POSTConvert physical and digital measurements across 80+ units/v1/convert/unitsfree

Cost and limits

This operation costs 1 token. A call that fails is never billed. Every account gets 1000 free tokens a month; paid balances never expire.

Rate limits per minute

No key 10 · Free 60 · Pro 300 · Enterprise 1200 ·

OpenAPI

https://app.castomapi.com/docs/json

Convert, generate & parse

Generate

Hashes, secrets, RSA keypairs, QR codes, screenshots, PDFs and DOCX from HTML, names and identities for test data.

Parse

Receipts, invoices (KSeF, ZUGFeRD), e-mails, files, webhooks, user agents, JSON and JSON Schema — into structure.

Minify

HTML, code, JSON, SVG, SQL, GraphQL, URLs and image metadata, made smaller without changing meaning.

Utilities

DNS, GeoIP, weather, domain checks, disposable e-mail, image search, OCR, PDF to text and image, Excel to JSON.