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CodeNotes Tools

Free online tools

Simple, fast utilities for students and developers. Free, fast and made for coding students.

Documents

PDF Merger

Combine multiple PDF files into one document. Reorder pages by file, then download instantly.

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Developer

AI SQL Query Generator

Describe what you need in plain English and get a ready-to-run SQL query for MySQL, PostgreSQL and more.

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Developer

JSON Formatter

Beautify, validate and minify JSON instantly, with clear error messages.

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Developer

Base64 Encoder & Decoder

Convert text to Base64 and back, with full UTF-8 and emoji support.

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Security

Password Generator

Create strong, random passwords with your chosen length and characters.

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Writing

Word Counter

Count words, characters, sentences and reading time for essays and assignments.

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Developer

URL Encoder & Decoder

Encode or decode URLs and query strings safely.

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Writing

Case Converter

Switch text to UPPER, lower, Title, camelCase, snake_case or kebab-case.

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Text

Remove Duplicate Lines

Delete repeated lines from any list in one click.

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Text

Sort Lines

Sort lines alphabetically A–Z, Z–A, or reverse their order.

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Security

Hash Generator

Create SHA-1, SHA-256 and SHA-512 hashes of any text.

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Developer

UUID Generator

Generate random version-4 UUIDs in bulk.

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Writing

Lorem Ipsum Generator

Create placeholder paragraphs for designs and mockups.

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Developer

Slug Generator

Turn titles into clean, SEO-friendly URL slugs.

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Developer

HTML Entity Encoder

Escape or unescape HTML special characters like < > & and quotes.

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Developer

Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal.

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Developer

Unix Timestamp Converter

Convert Unix timestamps to readable dates and back.

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Security

JWT Decoder

Read the header and payload of a JSON Web Token.

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Developer

Regex Tester

Test regular expressions against text and see every match.

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Developer

CSS Minifier

Shrink CSS by removing comments and extra spaces.

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Design

Color Converter

Convert colours between HEX, RGB and HSL.

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Developer

Text to Binary

Convert text to binary code and binary back to text.

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Text

Morse Code Translator

Translate text to Morse code and Morse back to text.

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Data

CSV to JSON Converter

Turn CSV rows into a JSON array using the first row as keys.

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Data

JSON to CSV Converter

Turn a JSON array of objects into a CSV you can open in Excel.

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Developer

SQL Formatter

Format messy SQL into readable, indented queries.

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Student

Random Number Generator

Pick random numbers in any range — great for practice and games.

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CodeNotes Library

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