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All Tools

Developer utilities that just work. No sign-up, 100% client-side.

← Magic Box
Base Converter

Binary, hex, octal, dec

encode
Base64

Encode & decode

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Binary Decoder

Encode & decode

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Case Converter

camelCase, snake_case, etc.

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Certificate / TLS chain viewer

Parse PEM chains: SAN, validity, fingerprint

security
Code Editor

40+ languages

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Code Screenshot

Snippet to a PNG

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Color Picker

Hex, RGB, HSL, eyedropper

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Cron Parser

Parse & explain cron

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CSV / Excel → JSON

Table view & export

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CSV / Excel Ops

Query, filter & dedupe

data
curl → Code

fetch / axios

web
curl Compare

Diff two curl commands

web
curl Online / HTTP Request

Paste curl, breakdown, send & view response

web
curl Viewer

Inspect & send curl in browser

web
Docker Compose

View services, ports & issues

web
Encoder/Decoder

Unified encode/decode

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Flow Canvas

Visual flow diagrams

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GraphQL Formatter

Format & validate GraphQL

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GraphQL Validator

Validate queries & schema

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Gzip Decompress Online

Gunzip Base64 & hex

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HAR Viewer

Inspect Chrome DevTools HAR files

web
Hash Generator

MD5, SHA-256, HMAC, Bcrypt

security
Hex / Base64 to PDF Viewer

Hex to PDF & base64 to PDF

encode
Hex Decoder

Encode & decode

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HTML Entities

Encode & decode

web
HTML Renderer Online

Live HTML preview

web
HTTP Status Codes

1xx–5xx reference

web
Image Compressor

Smaller JPEG, no upload

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Image to Base64

Image → data URL / base64

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Image token calculator

Image tokens for OpenAI, Claude, Gemini

llm
JSON → Types

JSON to TS, Zod, Python, Go, Rust

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JSON ↔ TOML

Convert both ways

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JSON ↔ YAML

Convert both ways

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JSON Diff Online

Compare two JSONs

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JSON Escape

Escape & unescape

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JSON Formatter

Pretty-print & validate

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JSON Operations

Query, filter & compare fields

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JSON Schema Validator

Validate JSON against schema

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JSONPath Tester

Query JSON with JSONPath

data
JWT Decoder

Decode tokens

security
JWT Sign

Create & sign JWT tokens

security
KSUID generator

K-sortable base62 IDs

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LLM RAM / VRAM

Weights + KV cache memory estimate

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LLM stream log viewer

Pretty-print SSE / NDJSON LLM streams

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Log Parser

Parse logs and extract fields

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Lorem Ipsum

Placeholder paragraphs

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Markdown

Preview with TOC

web
MCP Inspector

Read MCP configs and tool schemas

llm
Meeting Times

One time, every city

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Mermaid

Diagrams & charts

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Minify

JS, CSS, HTML, XML, JSON, GraphQL, SQL, YAML

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Open Graph / Meta

OG & Twitter meta tags + preview

web
OpenAPI viewer & curl

Browse OpenAPI / Swagger ops, copy curl

web
Password Generator

Random, passphrase, PIN

security
QR Code

Generate & scan

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QR Code to Link

Scan QR and reveal URL

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Regex Generator

Create regex from examples

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Regex Tester

Test patterns

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Remove Duplicate Lines

Unique lines, sort, download

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S3/R2 CORS

Fix bucket CORS errors

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Safe Links Decoder

Unwrap protected URLs

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Slug Generator

URL-friendly slugs

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SQL Formatter

Format & beautify SQL

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Text Diff

Compare two texts side-by-side or unified

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Text Editor

Plain text editor

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Timestamp Converter

Unix epoch ↔ date & UTC

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Token & context budget

Count prompt tokens vs context window

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Token Calculator Online

Tiktoken counter & tokens→words

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Token speed simulator

Prefill vs decode latency

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TOML Formatter Online

Format toml & TOML linter

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ULID generator

Lexicographic sortable IDs

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Unicode Decoder

Encode & decode

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Unit Converter

Duration, length, mass, data

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URL Parser

Parse & encode

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URL Shortener

Short links, custom alias

web
UTM Builder

Campaign links, then shorten

web
UUID Generator

Generate & format UUIDs in bulk

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UUID Validator

Validate & reformat UUID / GUID

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Webhook HMAC Verifier

Verify Stripe / GitHub / Slack HMAC

security
WhatsApp Link

wa.me chat link and QR

web
Word Counter

Words, characters, reading time

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XML Formatter

Format, validate, minify XML

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YAML Diff Online

Compare two YAML files online

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YAML Formatter

Pretty-print, validate, minify

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YAML Validator

Parse check with line hints

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More tools coming soon • Use Magic Box to auto-detect your input