> For the complete documentation index, see [llms.txt](/llms.txt).
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19 endpoints

# Developer API

Same bearer token, same credit pool, same JSON envelope as every other endpoint — drop them into apps, sites, workflows, or agents without rebuilding formulas, validation, or docs.
[Start free →](/billing/checkout/?plan=free) [View OpenAPI](/v1/docs) [All categories](/tools/)
CSS
[
CSS Grid Generator css-grid-generator
Generate responsive or fixed CSS Grid styles and matching HTML markup.
1cr · v2026-04-22
](/tools/css-grid-generator/)
Color
[
Color Inverter color-inverter
Invert a hex colour and report luminance plus a readable text colour.
1cr · v2026-04-22
](/tools/color-inverter/)
Data Conversion
[
cURL to JSON Converter curl-to-json-converter
Parse a curl command into structured JSON (method, URL parts, headers, cookies, auth, body) and emit equivalent Python, Node.js, PHP, or Go code.
1cr · v2026-04-22
](/tools/curl-to-json-converter/) [
JSON to YAML Converter json-to-yaml-converter
Convert a JSON document into block-style YAML, quoting only the scalars that need it.
1cr · v2026-04-22
](/tools/json-to-yaml-converter/) [
XML to JSON Converter xml-to-json-converter
Convert XML into JSON using standard, compact, JsonML, or preserve styles.
1cr · v2026-04-22
](/tools/xml-to-json-converter/)
Data Formatting
[
ISO 8601 Date Formatter iso-8601-date-formatter
Render one instant as ISO 8601 extended, basic, week and ordinal dates, RFC 2822, HTTP-date, and Unix time.
1cr · v2026-04-22
](/tools/iso-8601-date-formatter/) [
JSON Formatter/Validator json-formatter-validator
Validate, beautify, minify, or repair JSON with precise error positions, size savings, nesting depth, and element counts.
1cr · v2026-04-22
](/tools/json-formatter-validator/) [
JSON Schema Generator json-schema-generator
Infer a JSON Schema (2020-12, 2019-09, or draft-07) from a sample document, with format detection, enum inference, and required-property control.
1cr · v2026-04-22
](/tools/json-schema-generator/) [
SQL Formatter sql-formatter
Format or minify SQL with keyword casing, breaking clauses and joins onto their own lines.
1cr · v2026-04-22
](/tools/sql-formatter/) [
YAML Formatter/Validator yaml-formatter-validator
Validate, format, minify, or convert YAML to JSON.
1cr · v2026-04-22
](/tools/yaml-formatter-validator/)
Data Validation
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UUID Validator/Decoder uuid-validator-decoder
Validate and decode UUIDs: version, variant, field breakdown, v1/v7 timestamps and MAC address, alternate encodings, and v3/v5 namespace verification.
1cr · v2026-04-22
](/tools/uuid-validator-decoder/) [
XML Validator xml-validator
Validate XML well-formedness and return document statistics.
1cr · v2026-04-22
](/tools/xml-validator/)
Encoders
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Text to Binary/Hex/ASCII Converter text-to-binary-hex-ascii-converter
Encode or decode text, binary, hex, and ASCII byte values.
1cr · v2026-04-22
](/tools/text-to-binary-hex-ascii-converter/)
General Tools
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ASCII Table Reference ascii-table-reference
Full 7-bit ASCII table in decimal, hex, octal, and binary, with single-character lookup.
1cr · v2026-04-22
](/tools/ascii-table-reference/) [
cURL Command Builder curl-command-builder
Assemble a shell-safe curl command from method, URL, query parameters, headers, body, and auth, in multi-line, one-line, CMD, or PowerShell style.
1cr · v2026-04-22
](/tools/curl-command-builder/) [
HTTP Status Code Reference http-status-code-reference
Look up an HTTP status code or browse the registered codes by class with their defining RFCs.
1cr · v2026-04-22
](/tools/http-status-code-reference/) [
Unix Permission Calculator unix-permission-calculator
Convert Unix permission digits into symbolic permissions and chmod notation.
1cr · v2026-04-22
](/tools/unix-permission-calculator/)
Logic
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Logic Gate Simulator logic-gate-simulator
Evaluate Boolean gate expressions and return a truth table, minterms, classification, and gate counts.
1cr · v2026-04-22
](/tools/logic-gate-simulator/)
Text Conversion
[
Text to SQL List Converter text-to-sql-list-converter
Convert lines of text into quoted SQL IN-list or tuple syntax.
1cr · v2026-04-22
](/tools/text-to-sql-list-converter/)
API OPERATIONAL v1 · OpenAPI 3.1 · MCP 2025-06-18
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