Developer Toolkit

Thezer0 Tools

Simple, fast tools for developers & creators

Developer Tools 5

JSON Formatter

Format and validate JSON instantly

JSON Validator

Validate JSON with detailed error messages

UUID Generator

Generate v4 UUIDs in bulk

Regex Tester

Test regex with live match highlighting

Base64 Encoder

Encode or decode Base64 text

Text Tools 5

Word Counter

Count words, characters and sentences

Case Converter

Convert text between case styles

Password Generator

Generate strong, random passwords

Remove Duplicates

Remove repeated lines from text

Text Sorter

Sort lines alphabetically or by length

Color Tools 2

Color Picker

Pick and copy colors in any format

RGB ↔ Hex

Convert between RGB and HEX colors

Image Tools 8

Image Compressor

Reduce image size without losing quality

Image Resizer

Resize images to exact dimensions

Crop Image

Crop images with drag selection or coordinates

PNG → JPG

Convert PNG to JPG with custom quality

JPG → PNG

Convert JPG images to lossless PNG in batch

Background Remover

Remove image backgrounds locally or via AI

Image to PDF

Convert images into a single PDF

PDF Tools 4

PDF Merger

Combine multiple PDFs into one

PDF Splitter

Split a PDF into pages or ranges

PDF Rotate

Rotate pages individually or all at once

PDF Compressor

Reduce PDF file size and remove metadata

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