Documentation

218+ browser tools · REST API · Node.js SDK · Python SDK · MCP Server · CLI (coming soon)

Quick start#

Browser tools

Use 218+ tools right now, no account needed.

Open tools →
Node / Python SDK

Install locally. 618 functions, no API key.

See SDK →
REST API

Call tools over HTTP from any language.

Get API key →
REST API: getting started
1
Create a free account

Click Sign in in the top-right corner: free forever, no credit card. Free accounts get 1,000 API calls/day and 3 AI generations/month per tool.

2
Get your API key

Go to Dashboard → API Keys and create a key. Keys are prefixed utx_live_. Keep it secret: treat it like a password.

3
Make your first call
cURL
curl https://api.utilix.tech/v1/tools/uuid \
  -H "Authorization: Bearer utx_live_..."
Node.js
const res = await fetch('https://api.utilix.tech/v1/tools/uuid', {
  headers: { 'Authorization': 'Bearer utx_live_...' }
})
const { uuid } = await res.json()
console.log(uuid) // → "550e8400-e29b-41d4-a716-446655440000"
Python
import requests

res = requests.get(
    'https://api.utilix.tech/v1/tools/uuid',
    headers={'Authorization': 'Bearer utx_live_...'}
)
print(res.json()['uuid'])
4
Check your usage

Every response includes rate limit headers so you know where you stand.

Response headers
X-RateLimit-Limit: 1000
X-RateLimit-Remaining: 994
X-RateLimit-Reset: 1719619200   # Unix timestamp, resets midnight UTC

Your dashboard also shows a live usage chart. Upgrade to Pro for 10,000 req/day and higher AI limits.

No API key needed for Node.js SDK, Python SDK, MCP Server, or CLI. Those run entirely locally: install once, use offline, no rate limits.

Authentication#

The REST API authenticates via Bearer token. Pass your API key in the Authorization header on every request.

Header format
Authorization: Bearer utx_live_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
utx_live_...All keys are live: use the dashboard to rotate or revoke them

Requests without a valid key return 401 Unauthorized. Generate keys from your dashboard.

SDKs#

Node.js SDKv0.4.0 · Live
npm install @utilix-tech/sdk
• 618 functions across 16 modules (each browser tool exposes multiple functions)
• Runs locally: no API key, no network
• Tree-shakeable subpath imports
• Full TypeScript types included
Quick start
import { formatJson } from '@utilix-tech/sdk/json'
import { hashAll } from '@utilix-tech/sdk/hashing'

const pretty = formatJson('{"a":1}', { indent: 2 })
const hashes = await hashAll('hello world')
Modules
@utilix-tech/sdk/jsonFormat, minify, diff, validate, JSONPath, CSV↔JSON, YAML↔JSON, TypeScript types
@utilix-tech/sdk/encodingBase64, URL, HTML entities, Base32 encode/decode
@utilix-tech/sdk/hashingMD5, SHA-1/256/512, bcrypt, HMAC, .htpasswd
@utilix-tech/sdk/textCase convert, slugify, word count, diff, lorem ipsum, HTML→Markdown
@utilix-tech/sdk/dataCSV, YAML, TOML, XML, INI, .env parse and convert
@utilix-tech/sdk/generatorsUUID v4/v7, ULID, passwords, strength check, fake data
@utilix-tech/sdk/timeDate diff, timezone convert, cron parse, relative time
@utilix-tech/sdk/unitsBytes, px/rem, number bases, semver, CIDR, currency format
@utilix-tech/sdk/networkHTTP status codes, IP validation, country flags
@utilix-tech/sdk/apicURL build/parse, JWT decode/sign, CORS headers, CSP header
@utilix-tech/sdk/codeSQL/HTML/JS/CSS format & minify, regex tester, GraphQL, git, docker, OpenAPI
@utilix-tech/sdk/colorHex/RGB/HSL/HSV/CMYK convert, palette generation, contrast check
@utilix-tech/sdk/cssCSS gradient, box-shadow, border-radius, animation generators
@utilix-tech/sdk/miscSVG optimize/sanitize, QR code (SVG), OG meta parse, Unicode, file size
@utilix-tech/sdk/ai_agentToken estimate/trim, chunk text, extract URLs/JSON/keywords, sanitize HTML, flatten/merge JSON, deduplicate lines, validate schema, PII/secret/injection detect
@utilix-tech/sdk/mediaImage format & dimension reading from raw bytes: PNG, JPEG, GIF, WebP, BMP
View on npm Examples on GitHub
Python SDKv0.4.0 · Live
pip install utilix-sdk
• 474 functions · 16 modules · covers 218+ browser tools
• Runs locally: no API key, no network
• Python 3.9+
• Identical return shapes to Node SDK
Quick start
from utilix.tools.json_tools import format_json
from utilix.tools.hashing import hash_all

pretty = format_json('{"a":1}', indent=2)
hashes = hash_all('hello world')
Modules
utilix.tools.json_toolsFormat, minify, diff, validate, JSONPath, CSV↔JSON, YAML↔JSON, TypeScript types
utilix.tools.encodingBase64, URL, HTML entities, Base32 encode/decode
utilix.tools.hashingMD5, SHA-1/256/512, bcrypt, HMAC, .htpasswd
utilix.tools.textCase convert, slugify, word count, diff, lorem ipsum, HTML→Markdown
utilix.tools.dataCSV, YAML, TOML, XML, INI, .env parse and convert
utilix.tools.generatorsUUID v4/v7, ULID, passwords, strength check, fake data
utilix.tools.time_toolsDate diff, timezone convert, cron parse, relative time
utilix.tools.unitsBytes, px/rem, number bases, semver, CIDR, currency format
utilix.tools.networkHTTP status codes, IP validation, DNS lookup
utilix.tools.api_toolscURL build/parse, JWT decode/sign, CORS headers, CSP header
utilix.tools.codeSQL/HTML/JS/CSS format & minify, regex tester, GraphQL, git, docker, OpenAPI
utilix.tools.colorHex/RGB/HSL/HSV/CMYK convert, palette generation, contrast check
utilix.tools.cssCSS gradient, box-shadow, border-radius, animation generators
utilix.tools.miscSVG optimize/sanitize, QR code, OG meta parse, Unicode, file size
utilix.tools.mediaImage compress, resize, format conversion
utilix.tools.ai_agentToken estimate/trim, chunk text, extract URLs/JSON/keywords, sanitize HTML, flatten/merge JSON, deduplicate lines, validate schema, PII/secret/injection detect
View on PyPI Examples on GitHub
Go SDKComing soon
go get github.com/utilix-tech/go-sdk
• Single binary: no runtime deps
• Idiomatic Go with typed error returns
• Perfect for CI scripts, CLIs, and server-side tooling

Integrations#

MCP ServerLive

@utilix-tech/mcp · v0.5.0 · 171 tools

Use 171 tools directly inside Claude, Cursor, and VS Code Copilot via the Model Context Protocol. No context-switching required.

• Runs locally via stdio: no API key, no network calls
• Works with Claude Desktop, Cursor, VS Code Copilot, and any MCP-compatible client
• Zero config: one npx line in your config file
Quick start
// Claude Desktop  ~/Library/Application Support/Claude/claude_desktop_config.json
// Cursor         ~/.cursor/mcp.json
{
  "mcpServers": {
    "utilix": {
      "command": "npx",
      "args": ["-y", "@utilix-tech/mcp"]
    }
  }
}

// VS Code Copilot  .vscode/mcp.json
{
  "servers": {
    "utilix": { "type": "stdio", "command": "npx", "args": ["-y", "@utilix-tech/mcp"] }
  }
}
Tool categories
JSON (13)format, minify, diff, validate, JSONPath, CSV↔JSON, YAML↔JSON, TypeScript/Go/Python/Zod type generation
Encoding (8)Base64, URL, HTML entities, Base32 encode/decode
Hashing (4)MD5, SHA-1/256/512, bcrypt hash & verify
Generators (5)UUID v4/v7, ULID, passwords, QR codes, random mock data
Text (11)case convert, slugify, word count, string escape, diff, lorem ipsum, HTML→Markdown, line ops, number→words, Unicode inspect
Time (5)Unix timestamp, cron parse, cron next runs, date diff, timezone convert
Units (2)bytes, px→rem/em/pt/vw
Network / API (5)JWT decode, cURL build/convert, CORS headers, HAR file viewer
Color (4)HEX/RGB/HSL convert, contrast check, palette, shades
Code (7)SQL/HTML format, regex tester, JS minify, GraphQL, .env, Docker image parse
Data (5)YAML validate, TOML, XML↔JSON, CSV parse, NDJSON format
CSS (2)minify, gradient generator
Misc (1)SVG optimize
AI Agent (27)token estimate/cost, PII/secret/prompt-injection detection, JSON repair, chunking, dedup, keyword/entity extraction, HTML/Markdown/JSON compression, reranking, relevance scoring, query expansion, summarization, passive-voice detection, image info
View on npm Prompts & config on GitHub
REST APILive

Call tools from any language over HTTP. Try it in the API Playground or get your key from the dashboard. Free: 1,000 req/day · Responses include X-RateLimit-Remaining headers.

curl https://api.utilix.tech/v1/tools/json-formatter \
  -H "Authorization: Bearer utx_live_..." \
  -H "Content-Type: application/json" \
  -d '{"input": "{\"a\":1}"}'
Full API reference
Embed SDKPro

Drop any Utilix tool into your own app with a single <script> tag. Tools render as full-featured iframes: no build step, no framework lock-in.

<!-- 1. Load the SDK -->
<script src="https://www.utilix.tech/sdk.js"></script>

<!-- 2a. Web Component -->
<utilix-tool name="svg-editor" api-key="utx_live_..." height="520"></utilix-tool>

<!-- 2b. JavaScript API -->
<div id="tool-container"></div>
<script>
  Utilix.render('css-style-tester', {
    apiKey: 'utx_live_...',
    container: '#tool-container',
    height: 600,
  })
</script>
Available embed tools
svg-editorSVG Viewer & Editor: live SVG code editor with render preview
css-style-testerCSS Style Tester: split-pane CSS + HTML editor with live preview
openapi-viewerOpenAPI Viewer: load any spec by URL or paste YAML/JSON inline
VS Code & Cursor ExtensionComing soon

Run any tool from the command palette without leaving your editor.

⌘⇧P → Utilix: Format JSON
⌘⇧P → Utilix: Decode JWT
⌘⇧P → Utilix: Generate UUID

Examples#

Working code examples for common patterns: RAG pipelines, PII redaction, context compression, batch processing, and agent tool use. All examples are verified against the live SDK.

Node.js
View on GitHub
ai-agent-pipeline.tsEnd-to-end RAG pipeline: compress HTML → chunk → detect PII → rerankrag-pipeline.tsFull RAG pre-processing: scrape → compress → chunk → expand query → pack contextcontext-compression.tsHTML, Markdown, and JSON compression + extractive summarizationpii-redaction.tsPII detection, redaction, secret scanning, prompt injection scoringjson-utilities.tsExtract, flatten, merge, diff, validate, repair, and compress JSONbatch-processing.tsBatch PII scan, token counting, keyword indexing, secret scanning
Python
View on GitHub
quickstart.pyToken estimation, chunking, PII, reranking, summarization, JSON diffrag_pipeline.pyCompress → chunk → query expansion → rerank → pack contextpii_redaction.pyPII scan/redact, secret detection, prompt injection scoring, safe loggingagent_tools.pyTool implementations for LLM agents (extract, fix, validate, diff JSON)
MCP: Example Prompts
View on GitHub
Token managementEstimate tokens, trim to budget, split into chunks
Context compressionCompress HTML/Markdown/JSON, summarize to token budget
RAG & RetrievalRerank chunks, score relevance, expand queries, extract keywords
Security & ComplianceScan PII, redact, detect secrets, score prompt injection
JSON operationsFormat, diff, fix, validate, flatten, merge, extract JSON
Multi-step skillsPipeline prompts that chain multiple tools end-to-end
REST API
View on GitHub
examples/curl/Shell scripts: AI agent tools and common utilitiesexamples/python/requests library with retry-on-429 helperexamples/node/Native fetch with typed responsesexamples/go/net/http client with typed structs

Snippets#

Snippets let you save named outputs, including regex patterns, CLI commands, and JSON schemas, then retrieve them via API or the dashboard. Free users get 5 snippets; Pro users get 100.

List
GET https://api.utilix.tech/v1/snippets
Authorization: Bearer utx_live_...

// → { "snippets": [{ "id": "...", "title": "Find emails regex", "content": "...", "toolSlug": "nl-regex" }], "plan": "free", "limit": 5 }
Save
POST https://api.utilix.tech/v1/snippets
Authorization: Bearer utx_live_...

{ "title": "Find emails regex", "content": "/[\\w.+-]+@[\\w-]+\\.[\\w.]+/g", "toolSlug": "nl-regex" }
Delete
DELETE https://api.utilix.tech/v1/snippets/{id}
Authorization: Bearer utx_live_...

AI Tools#

AI tools call GPT-4o server-side and return structured results. Every free account gets 3 generations/month per tool. Pro gets higher monthly limits. Generated SVGs get a permanent public URL.

SVG Generator#

Free: 3/month · Pro: 50/month · Team: unlimited
Request
POST https://api.utilix.tech/v1/svg/generate
Authorization: Bearer utx_live_...

{ "prompt": "A minimal rocket ship launching with stars",
  "width": 400, "height": 400, "style": "flat, monochrome" }
Response
{ "id": "utx_abc123def456",
  "url": "https://api.utilix.tech/v1/svg/utx_abc123def456",
  "svgContent": "<svg ...>...</svg>",
  "tokensUsed": 843, "model": "gpt-4o" }
Embed the result
<!-- Web Component -->
<script src="https://www.utilix.tech/sdk.js"></script>
<utilix-svg id="utx_abc123def456"></utilix-svg>

<!-- Plain img or direct URL (works in Markdown, Notion, Figma) -->
<img src="https://api.utilix.tech/v1/svg/utx_abc123def456" alt="rocket" />

NL → Regex#

Free: 3/month · Pro: 20/month · Team: unlimited
Request
POST https://api.utilix.tech/v1/ai/regex
Authorization: Bearer utx_live_...

{ "description": "US phone numbers with dashes or dots" }
Response
{ "pattern": "\\(?(\\d{3})\\)?[-.\\s]?(\\d{3})[-.\\s]?(\\d{4})",
  "flags": ["g"],
  "explanation": "Matches US phone numbers with optional area code parentheses...",
  "examples": { "matches": ["555-867-5309", "(555) 867.5309"] },
  "model": "gpt-4o-mini", "tokensUsed": 312 }
Try in browser

CLI Builder#

Free: 3/month · Pro: 20/month · Team: unlimited
Request
POST https://api.utilix.tech/v1/ai/cli
Authorization: Bearer utx_live_...

{ "task": "Find all .ts files changed in the last 7 days", "shell": "bash" }
Response
{ "command": "find . -name \"*.ts\" -mtime -7",
  "breakdown": [
    { "part": "find .",       "description": "Start search from current directory" },
    { "part": "-name \"*.ts\"", "description": "Match TypeScript files" },
    { "part": "-mtime -7",    "description": "Modified within last 7 days" }
  ],
  "model": "gpt-4o-mini", "tokensUsed": 284 }
Try in browser

CSS Explainer#

Free: 3/month · Pro: 30/month · Team: unlimited
Request
POST https://api.utilix.tech/v1/ai/css
Authorization: Bearer utx_live_...

{ "css": ".card { display: flex; gap: 1rem; padding: 1.5rem; }" }
Response
{ "blocks": [{
    "selector": ".card",
    "summary": "A flex card with spacing and padding",
    "properties": [
      { "property": "display",  "value": "flex",   "explanation": "Flex container: children lay out in a row" },
      { "property": "gap",      "value": "1rem",   "explanation": "16px space between each flex child" },
      { "property": "padding",  "value": "1.5rem", "explanation": "24px inner space on all sides" }
    ]
  }],
  "suggestions": ["Consider overflow: hidden if children can break layout"],
  "model": "gpt-4o-mini", "tokensUsed": 312 }
Try in browser

JSON Schema Generator#

Free: 3/month · Pro: 30/month · Team: unlimited
Request
POST https://api.utilix.tech/v1/ai/json-schema
Authorization: Bearer utx_live_...

{ "description": "A user profile with name, email, age, and optional bio",
  "example": "{ \"name\": \"Alice\", \"email\": \"alice@example.com\", \"age\": 28 }" }
Response
{ "schema": {
    "type": "object",
    "required": ["name", "email"],
    "properties": {
      "name":  { "type": "string" },
      "email": { "type": "string", "format": "email" },
      "age":   { "type": "integer", "minimum": 0 },
      "bio":   { "type": "string" }
    }
  },
  "model": "gpt-4o-mini", "tokensUsed": 284 }
Try in browser

Rate limits#

Limits by plan
API calls (all tools)1,000 req/day10,000 req/dayUnlimited
Saved snippets5 total100 totalUnlimited
SVG generation3/month50/monthUnlimited
NL → Regex3/month20/monthUnlimited
CLI Builder3/month20/monthUnlimited
CSS Explainer3/month30/monthUnlimited
JSON Schema Gen3/month30/monthUnlimited
FreeProTeam

AI generation limits reset on the 1st of each month. API daily limits reset at midnight UTC. Rate limit headers: X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset.

Errors#

Error codes
400Bad RequestMissing or invalid input field
401UnauthorizedMissing or invalid API key
403ForbiddenPlan limit reached: upgrade required
404Not FoundResource does not exist
429Too Many RequestsRate limit exceeded (daily API or monthly AI)
502Bad GatewayAI provider returned an error
Error response shape
// Standard error
{ "error": "prompt is required", "code": "validation_error" }

// 403 — free plan AI limit reached
{ "error": "Free plan includes 3 AI generations/month.",
  "code": "upgrade_required",
  "used": 3, "limit": 3,
  "resets": "first of next month",
  "upgradeUrl": "https://www.utilix.tech/pricing" }

CLI#

@utilix-tech/cliComing soon

Run any tool from the terminal. Works via npx with no install required.

npx @utilix-tech/cli json format '{"a":1}'
npx @utilix-tech/cli hash sha256 "hello world"
npx @utilix-tech/cli uuid