Developer utility API

One API for the utilities you keep rewriting

Hash strings, generate UUIDs, format JSON, create QR codes, render OG images. 13 endpoints, one key, zero dependencies.

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base64: aGVsbG8gd29ybGQ=
slug: hello-world
sha-256: —

62 endpoints

<50ms avg response

99.9% uptime

0 dependencies

Try it now

API playground

Pick an endpoint, edit the JSON, hit Run. Live responses, no signup required.

How it works

From zero to API call in under a minute

Get your key

Free, no credit card. 1,000 requests/day.

Call any endpoint

REST + JSON. Works from anywhere.

Ship your feature

Skip the boilerplate. Focus on your product.

Endpoints

Everything you need, one API call away

Text & data

/v1/base64/encode
Base64 encode and decode strings or files
/v1/json/format
Format, minify, and validate JSON
/v1/text/stats
Word count, reading time, sentence analysis
/v1/text/language
Detect language using trigram analysis
/v1/csv/to-json
Parse CSV to JSON with header support
/v1/html-sanitize
Strip dangerous HTML tags and attributes

Developer utilities

/v1/hash
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes
/v1/jwt/generate
Sign JWTs with HS256 via Web Crypto
/v1/totp/generate
Generate and validate TOTP codes (RFC 6238)
/v1/math/evaluate
Safe math expression evaluator (no eval)
/v1/units/convert
Convert length, weight, temp, data, time units

Image generation

/v1/og-image
Generate Open Graph images with custom branding
/v1/qr-code
Create QR codes in PNG or SVG
/v1/placeholder
Generate SVG placeholder images with text
/v1/avatar
Deterministic geometric avatars from seed strings
/v1/barcode
Generate Code 128 barcodes as SVG

Quick start

Three lines to your first API call

curl -X POST \
  https://api.botoi.com/v1/hash \
  -H "Content-Type: application/json" \
  -d '{"text": "hello", "algorithm": "sha256"}'

const res = await fetch(
  "https://api.botoi.com/v1/hash",
  {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      text: "hello",
      algorithm: "sha256",
    }),
  }
);
const data = await res.json();

import requests

res = requests.post(
    "https://api.botoi.com/v1/hash",
    json={
        "text": "hello",
        "algorithm": "sha256",
    },
)
data = res.json()

Pricing

Start free, scale when you need to

Free

$0 /mo

* 1,000 requests/day

* 10 req/min

* All endpoints

* JSON responses

* Community support

Get free API key

Starter

$9 /mo

* 10,000 requests/day

* 30 req/min

* All endpoints

* JSON responses

* Priority support

* Usage dashboard

Get started

Pro

$49 /mo

* 100,000 requests/day

* 300 req/min

* All endpoints

* JSON responses

* Priority support

* Usage dashboard

* Webhook notifications

Go Pro

Business

$199 /mo

* 1,000,000 requests/day

* 1,000 req/min

* All endpoints

* JSON responses

* Dedicated support

* Usage dashboard

* Webhook notifications

* Custom rate limits

Contact sales

Free browser tools

Try before you API

Every API endpoint has a matching browser tool. Test the functionality, then automate it with the API.

Formatador e Validador JSON

Formate, embeleze, minifique e valide dados JSON online. Detecção de erros instantânea com números de linha.

Codificador / Decodificador Base64

Codifique e decodifique strings Base64 online. Suporte para codificação de texto e Base64 segura para URLs.

Conversor de Cores

Converta cores entre os formatos HEX, RGB e HSL. Visualização ao vivo com cópia instantânea para a área de transferência.

Calculadora de Juros Compostos

Calcule juros compostos com aportes mensais. Veja a evolução do crescimento ano a ano.

Testador de Regex

Teste expressões regulares com destaque ao vivo, detalhes de correspondência e extração de grupos de captura.

Image Converter

Convert images between HEIC, WebP, AVIF, PNG, BMP, GIF, and SVG formats. Preserves EXIF metadata and handles orientation correctly.

View all 22 tools →

FAQ

Common questions

Do I need an API key? +

No. You can try any endpoint without a key at 5 requests/min. Sign up for a free key to get higher limits.

How is rate limiting handled? +

Each tier has a per-minute and per-day cap. When you hit the limit, the API returns a 429 status with a Retry-After header.

What response format does the API use? +

All endpoints return JSON. Error responses follow a consistent { "error": { "code": "...", "message": "..." } } shape.

Can I upgrade or downgrade my plan? +

Yes. Changes take effect at the start of your next billing cycle. You keep your existing API key.

Is there an OpenAPI spec? +

Yes. The full OpenAPI 3.1 spec is available at api.botoi.com/docs and can be imported into Postman, Insomnia, or any compatible client.

Start building in under a minute

Free API key, no credit card, 1,000 requests/day.

Get free API key View docs