Developer Tools

Open a tool, paste your input, and get a result — entirely in your browser.

All Tools

Edit, format, validate, and transform JSON

Markdown Preview

Live markdown editor with rendered preview

Minify JavaScript — compress, mangle variables, drop console.log

Minify CSS — remove whitespace, comments, and optimize values

Minify SVG markup — strip comments and collapse whitespace

Formatters ≡≡

Find Duplicate Lines

Detect duplicate lines with color-coded visual highlighting

Compare two texts and highlight differences

String Utilities

Case conversion, random strings, count, transform

Test JavaScript regex with live matches, groups & replace

Turn any text into a clean, URL-safe slug

Encode and decode Base64 strings

Encode and decode URLs and query strings

Encode and decode HTML entities

Escape and unescape Unicode characters (\uXXXX)

Encode text to hex bytes and decode back

Encode text to binary bits and decode back

Convert between HEX, RGB, HSL, HSV, CMYK with swatches

Image Converter

Convert images between PNG, JPEG, and WebP formats

Converters 64→IMG

Base64 to Image

View, decode, and download images from a Base64 string

Crop, rotate, flip, resize, and adjust filters, then optimize and export

Convert SVG markup to PNG or WebP at any resolution

Convert YAML to JSON and JSON to YAML

Converters 2→16

Number Base Converter

Convert numbers between binary, octal, decimal, and hex

Timezone Converter

Convert a date and time between timezones

DateTime Converter

Convert Unix timestamps to human-readable dates and back

Convert CSV to JSON and JSON to CSV with custom delimiters

Generate TypeScript, Go, C#, Dart, Kotlin models from JSON

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

Password Generator

Generate strong random passwords

Decode and inspect JSON Web Tokens

Obfuscate JavaScript — protect source code with string arrays and control flow

Generate random UUIDs (v4)

ObjectId Generator

Generate MongoDB-compatible ObjectIds

Generators ULID

Generate sortable, timestamp-based ULIDs

Lorem Ipsum Generator

Generate placeholder text — words, sentences, or paragraphs

Build cron expressions with a visual editor

Parse cron expressions and see next run times

Favicon Generator

Generate favicon PNGs in every standard size from one image

Placeholder Image Generator

Generate placeholder images with custom size, color, and text

QR Code Generator

Generate a QR code from any text or URL

WCAG Contrast Checker

Check color contrast ratio against WCAG AA/AAA

Meta Tag Generator

Generate meta, Open Graph, and Twitter Card tags with live previews

.gitignore Generator

Generate a .gitignore file from language, IDE, and OS templates

Formatters

Edit, format, validate, and transform JSON

Markdown Preview

Live markdown editor with rendered preview

Minify JavaScript — compress, mangle variables, drop console.log

Minify CSS — remove whitespace, comments, and optimize values

Minify SVG markup — strip comments and collapse whitespace

Text

Find Duplicate Lines

Detect duplicate lines with color-coded visual highlighting

Compare two texts and highlight differences

String Utilities

Case conversion, random strings, count, transform

Test JavaScript regex with live matches, groups & replace

Turn any text into a clean, URL-safe slug

Encoders

Encode and decode Base64 strings

Encode and decode URLs and query strings

Encode and decode HTML entities

Escape and unescape Unicode characters (\uXXXX)

Encode text to hex bytes and decode back

Encode text to binary bits and decode back

Converters

Convert between HEX, RGB, HSL, HSV, CMYK with swatches

Image Converter

Convert images between PNG, JPEG, and WebP formats

Base64 to Image

View, decode, and download images from a Base64 string

Crop, rotate, flip, resize, and adjust filters, then optimize and export

Convert SVG markup to PNG or WebP at any resolution

Convert YAML to JSON and JSON to YAML

Number Base Converter

Convert numbers between binary, octal, decimal, and hex

Timezone Converter

Convert a date and time between timezones

DateTime Converter

Convert Unix timestamps to human-readable dates and back

Convert CSV to JSON and JSON to CSV with custom delimiters

Generate TypeScript, Go, C#, Dart, Kotlin models from JSON

Security

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

Password Generator

Generate strong random passwords

Decode and inspect JSON Web Tokens

Obfuscate JavaScript — protect source code with string arrays and control flow

Generators

Generate random UUIDs (v4)

ObjectId Generator

Generate MongoDB-compatible ObjectIds

Generate sortable, timestamp-based ULIDs

Lorem Ipsum Generator

Generate placeholder text — words, sentences, or paragraphs

Schedulers

Build cron expressions with a visual editor

Parse cron expressions and see next run times

Web Tools

Favicon Generator

Generate favicon PNGs in every standard size from one image

Placeholder Image Generator

Generate placeholder images with custom size, color, and text

QR Code Generator

Generate a QR code from any text or URL

WCAG Contrast Checker

Check color contrast ratio against WCAG AA/AAA

Meta Tag Generator

Generate meta, Open Graph, and Twitter Card tags with live previews

.gitignore Generator

Generate a .gitignore file from language, IDE, and OS templates

Why Choose EasyDev Tools?

EasyDev is a curated toolbox for software engineers who want fast, reliable, ad-free utilities for everyday work — formatting JSON, decoding Base64, generating UUIDs, building cron expressions, comparing text, and more. Every tool here is designed to load instantly, work offline once the page is open, and never get in the way of shipping code.

100% Client-Side Privacy

Every tool on EasyDev runs entirely inside your browser. The data you paste — API keys, JWT tokens, JSON payloads, private SQL queries, customer strings — is processed locally by JavaScript on your own machine. Nothing is ever uploaded to a server, logged in an analytics pipeline, or shared with a third party. This is a deliberate architectural choice: we do not run a backend that receives your input, so there is no transcript of your usage and no opportunity for accidental data leakage. If you work under compliance constraints — SOC 2, HIPAA, GDPR, internal data-handling policies — you can use EasyDev without worrying that confidential text crossed an external boundary. The privacy guarantee is enforced by the network: open DevTools, flip to the Network tab, and you will see zero requests when you click Encode, Format, or Generate.

Fast & Ad-Free Experience

EasyDev is built on Next.js with statically rendered pages, minimal JavaScript bundles per tool, and no ad networks, no tracking pixels, and no popup overlays. Open a tool, do the job, close the tab — that is the entire flow. There is no signup, no rate limit, no “upgrade to Pro” modal. The tools are free because they are simple and cheap to host, and they will stay free. If something feels slow, missing, or wrong, the source is auditable and the feedback loop is short — we ship fixes routinely. EasyDev is what every developer toolbox should be: focused, honest, and out of your way.