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narzędzia dla programistów

40+ niezbędnych narzędzi dla programistów. Bez rejestracji, bez limitów. Wszystkie operacje odbywają się w przeglądarce — twoje dane nigdy nie opuszczają urządzenia.

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JSON Formatter

Format, validate, and beautify JSON data with syntax highlighting

B64

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 back to text

%20

URL Encoder/Decoder

Encode or decode URL components and query parameters

#

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text

ID

UUID Generator

Generate random UUIDs (v4) in bulk with one click

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Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates

🎨

Color Converter

Convert colors between HEX, RGB, HSL formats with preview

.*

Regex Tester

Test regular expressions with real-time matching and highlighting

MD

Markdown Preview

Write Markdown and see the rendered preview side by side

JWT

JWT Decoder

Decode and inspect JSON Web Tokens (header, payload, signature)

QR Code Generator

Generate QR codes from text, URLs, or any data

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Lorem Ipsum Generator

Generate placeholder text in paragraphs, sentences, or words

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HTML Entity Encoder

Encode and decode HTML entities and special characters

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CSS Minifier / Beautifier

Minify or beautify CSS code for production or readability

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Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal

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Text Diff Checker

Compare two texts and highlight the differences

123

Word Counter

Count words, characters, sentences, and paragraphs in text

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Password Generator

Generate secure random passwords with customizable options

SQL

SQL Formatter

Format and beautify SQL queries for better readability

Cron Expression Parser

Parse and explain cron expressions with next run times

Y{}

JSON ↔ YAML Converter

Convert between JSON and YAML formats instantly

Aa

String Case Converter

Convert text between camelCase, snake_case, kebab-case, and more

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URL Slug Generator

Convert text to SEO-friendly URL slugs

🛡️

Chmod Calculator

Calculate Linux file permissions with interactive checkboxes

↕️

Line Sort & Dedup

Sort lines, remove duplicates, reverse, shuffle, and more

JS

JS/HTML Formatter

Minify or beautify JavaScript and HTML code

🖼️

Image Base64 Converter

Convert images to Base64 strings and data URIs with drag & drop

🔀

Git Command Generator

Visual Git command builder — select an action, fill in parameters, copy the command

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Formatowanie XML

Formatuj, minifikuj i waliduj XML

📊

Konwerter CSV ↔ JSON

Konwertuj między CSV i JSON

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Referencja kodów HTTP

Sprawdź kody statusu HTTP z opisami

📄

Wyszukiwarka MIME Type

Znajdź typy MIME po rozszerzeniu pliku

\

Escape / Unescape

Escape lub unescape HTML, JavaScript i JSON

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Kalkulator podsieci IP

Oblicz maskę podsieci, sieć i broadcast

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Generator fałszywych danych

Generuj fałszywe nazwiska, emaile do testów

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Generator HMAC

Generuj HMAC-SHA256, HMAC-SHA1

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Parser URL

Parsuj URL na składniki

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Konwerter tekst-binarny

Konwertuj tekst na binarny i odwrotnie

📜

Dekoder PEM / certyfikat

Dekoduj certyfikaty PEM

📋

Generator tabel HTML

Konwertuj CSV lub JSON na tabelę HTML

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Generator hashy Bcrypt

Generuj hashe bcrypt z konfigurowalnym kosztem

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Why DevToolBox?

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Privacy First

All data is processed locally in your browser. Nothing is sent to any server.

Instant & Fast

No loading, no waiting. Tools work instantly with zero latency.

🆓

100% Free

No signup, no limits, no hidden fees. Free forever.

📱

Works Everywhere

Fully responsive. Use on desktop, tablet, or mobile.