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DevBox

A utility workspace for text processing, encryption, debugging, data conversion, and system tools. Pick a group from the left or jump in from the quick actions below.

Feature groups 6 groups

Main tools 30+ features

Interface Dark utility dashboard

Encryption & Security

Multi-Encoder, Steganography, Hashing, Obfuscator, JWT, and security tools.

Development Tools

Formatter, Cron builder, diff, bitwise, epoch, and Batch run mode.

Text & Data

Advanced text, YAML↔JSON, Base64 files, CSV↔JSON, and Markdown.

Files & System

Checksum, UNIX helper, MIME detect, QR code, UUID/ULID và password checker.

Multi-Encoder / Decoder

Input Buffer

Output ResultCOPY

Steganography (LSB Optimized)

Host Image (PNG only for decoding)

No Image

Secret Data

Extracted Result

Hashing & AES Encryption

Source Data

AES Secret Key

Action ResultCOPY

JavaScript Obfuscator

JS Code Input

Scrambled Output

JWT Encoder & Debugger

JWT Token String Sign Algorithm Secret Key

Header (JSON) Payload (JSON)

Code Formatter & Prettifier

Source Code

JSON Schema Validator

JSON Schema

JSON Data

Validation Result

Professional Diff Checker

Old Version

New Version

32-Bit Register Visualizer

Decimal (Unsigned)

Hexadecimal

Epoch Time Engine

Seconds (Unix)

Milliseconds

ISO 8601 String

Local Time

Relative Time

Massive Mock Data Generator

Template

Batch Count

Action

Advanced Text Processor

Words: 0 | Chars: 0 | Lines: 0

Color System

Palette Picker

HEX

RGB

#38BDF8

Image Assets Converter

Upload Image

Preview Area

Base64 DataCOPY

Password Generator

Length: 16

Uppercase Lowercase Numbers Symbols

Generated PasswordCOPY

Strength

-

Password Strength Checker

Check Password

Score

Suggestions

UUID / ULID Generator

Type

Batch Count

Output

QR Code Generator

Text/URL

Size

Error Correction

FG Color

BG Color

QR output here

Regex Tester

Pattern

Test String

Global Ignore Case Multiline

Results

Text Statistics

Input Text

Characters

0

Words

0

Lines

0

Read Time

0s

Sentences

0

Avg Word Length

0

Top 10 Words (by frequency)

Text Compare / Keyword Finder

Compare Text

Comparison Result

Keywords

Caesar Cipher

Input

Output

Shift: 3

Brute Force All Shifts

ROT13/ROT-N

Input

Output

Custom ROT

CSV ↔ JSON Converter

CSV Input

JSON Output

First row is header

URL Component Parser

URL

Protocol

-

Host

-

Port

-

Path

-

Query

-

Hash

-

Query Parameters

JSON Minifier

Input (formatted)

Output (minified)

COPY

Markdown to HTML Converter

Markdown Input

HTML Output

COPY OUTPUT

File Checksum Calculator

Upload File

MD5

SHA256

UNIX/Linux Command Helper

Search Command

Command Info & Examples

Vigenère Cipher

Text

Key

OutputCOPY

MIME Type Detector

Upload File

MIME Type

File Size

File Signature (Hex)

YAML ↔ JSON Converter

YAML Input

JSON OutputCOPY

Base64 File Encoder/Decoder

Select File

File Name

File Size

Base64 OutputCOPY

Cron Expression Builder & Validator

Minute (0-59)

Hour (0-23)

Day (1-31)

Month (1-12)

Day of Week (0-7)

Cron Expression

Validation Result

Batch Run Mode (Multi-Input Processor)

Tool Selection

Input Lines (one per line)

Results OutputCOPY

Tool Presets & Quick Config

Save and load common configurations for any tool.

Preset Name

Tool

Saved Presets

Local API Tester

Request Headers (JSON) Request Body

Response

Curl to Code Converter

cURL Command

Generated Code COPY

User-Agent Parser

User-Agent String

Browser

OS

Device

Engine

IP Subnet Calculator

IP Address / CIDR

Network Address

Broadcast Address

Netmask

Usable Host Range

Total Hosts

IP Class

CSS Box-Shadow Generator

Shift Right (px) 10 Shift Down (px) 10 Blur (px) 15 Spread (px) -3 Shadow Color Opacity 0.5

Inset

COPY

Glassmorphism Generator

Blur (px) 10 Transparency 0.2 Background Color Outline Opacity 0.3

Glassmorphism Preview

COPY

CSS Gradient Builder

Type Angle (Linear only) 90°

Color 1

Color 2

COPY

CSS Triangle Generator

Direction Width (px) 100 Height (px) 100 Color

COPY

Color Contrast Checker

Foreground (Text) Background

Text Preview

21.00 : 1

AA: Pass

AAA: Pass

PX ↔ REM ↔ EM Converter

Base Pixel Size (Default: 16px)

Pixels (px)

REM / EM

SVG Viewer & Optimizer

SVG Code

Preview

Optimized Code COPY

XML ↔ JSON Converter

Input Data

Output Data COPY

TOML ↔ JSON Converter

Input Data

Output Data COPY

Excel/TSV to JSON/SQL

Paste Excel / TSV Data

First row is Header

Output Data COPY

Bencode Parser (.torrent data)

Bencode String

JSON Output COPY

Number Base Converter

Binary (Base 2)

Octal (Base 8)

Decimal (Base 10)

Hexadecimal (Base 16)

RSA Key Pair Generator

Key Size (bits)

Public Key COPY

Private Key COPY

PBKDF2 Key Derivation

Password / Secret Phrase Salt (Hex or Plaintext) Iterations Key Size (bits)

Derived Key (Hex) COPY

Linux Chmod Calculator

Owner

Read (4)

Write (2)

Execute (1)

Group

Read (4)

Write (2)

Execute (1)

Public (Others)

Read (4)

Write (2)

Execute (1)

Octal Value

Symbolic String

Base32 / Base58 Encoder

Input String

Result COPY

URL & HTML Entity Encoder

Input Text

Result COPY

.gitignore Generator

Select Environments / Languages

Generated .gitignore COPY

README Builder

Project Name Description

Installation Section

Usage Section

API Reference

Contributing Guidelines

License (MIT)

Markdown Output COPY

HTML5 Boilerplate

Include styles.css link

Include app.js script

Include SEO Meta tags

Include OpenGraph (Social) tags

Include Favicon

HTML Code COPY

Regex Builder (Visual)

Starts with Contains Ends with

Ignore Case (i)

Global (g)

Multiline (m)

Generated Regex COPY

Lorem Ipsum Generator

Paragraphs

Output Text COPY

String Case Converter

Input String

camelCase PascalCase snake_case kebab-case CONSTANT_CASE Title Case

JSON Path Tester

JSONPath Query

JSON Data

Result COPY

XPath Evaluator

XPath Expression

XML Data

Result COPY

Morse Code Converter

Input Text

Result COPY

ASCII Art Generator

Text Font Style

ASCII Output COPY