MyDevToolbox 100% Client-Side
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100% In-Browser • Zero Tracking • Zero Latency

Every Web Tool You Need, In One Place.

Fast, free micro-utilities running purely in your browser memory.

Top Ranked

Client-Side PDF Merger

Combine multiple PDF documents together without uploading files to any external server.

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Universal

Live QR Code Generator

Generate instant high-res QR codes for URLs, WiFi logins, contact cards, and text.

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Top Used

Image Compressor & WebP

Reduce PNG/JPG file sizes and convert to next-gen WebP directly in browser Canvas.

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Writing

Text Case Converter

Switch text between Title Case, UPPERCASE, lowercase, camelCase, snake_case, & kebab-case.

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Daily

Metric & Unit Converter

Instant conversion between Metric and Imperial lengths, weights, temperatures, and data bytes.

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Content

Markdown Live Preview

Live Markdown to formatted HTML previewer with real-time word and character statistics.

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Writers

Word & Character Counter

Real-time word, character, sentence, paragraph, and reading time estimation metrics.

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Design

Aspect Ratio Calculator

Compute dimensions for 16:9, 4:3, 1:1, and custom responsive resolutions.

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Mockup

Lorem Ipsum Text Builder

Generate paragraphs, sentences, or word counts of placeholder filler text.

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Web

URL Encoder & Decoder

Safely encode special query parameters or decode percent-encoded URLs.

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Testing

Dummy Test Card Generator

Generate valid dummy payment card numbers for software QA and billing testing.

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Design

Color Palette Builder

Generate modern harmonic UI color palettes with instant HEX & RGB copy.

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Pro Studio

JSON Studio & Validator

Dual-pane syntax highlighting, beautifier, tree inspector, and live error locator.

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TypeScript

JSON to TypeScript

Turn nested JSON payloads into clean, strongly-typed TypeScript definitions.

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Data

JSON to CSV Converter

Convert array of JSON objects into Excel-ready CSV spreadsheets.

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Parser

CSV to JSON Parser

Transform comma-separated text sheets into structured JSON data structures.

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Binary

Base64 Text & Data URL

Encode or decode strings and binary image files with full Unicode support.

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Cleaner

JSON & String Escaper

Escape quotes, newlines, and backslashes for programming literals and SQL inserts.

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Entities

HTML Entity Converter

Convert characters to HTML entities (&, <, >, ") and vice versa.

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Converter

XML to JSON Converter

Parse standard XML tag structures directly into JSON object trees.

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Lists

Duplicate Line Cleaner

Remove duplicate rows, sort alphabetical lines, and strip empty whitespace.

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Compress

JSON Compact Minifier

Strip extra spaces and minify JSON files for lightning fast API payloads.

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Organize

Sort JSON Keys Alphabetically

Sort nested JSON object keys alphabetically for clean deterministic diffs.

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Viewer

Data Tree & Type Inspector

Examine data node depth, byte footprints, and primitive types in realtime.

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Security

UUID v4 Batch Creator

Generate batch RFC4122 v4 unique identifiers via Web Crypto API.

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Safety

Password & Token Generator

Create cryptographically secure passwords with custom lengths and symbols.

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Crypto

SHA-256 & SHA-512 Hasher

Calculate cryptographic message digests instantly in browser memory.

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SEO

URL Slug & Permalink Creator

Convert article titles into clean, URL-safe permalinks for blogs and websites.

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Random

Random Salt & Hex String

Create random hexadecimal and alphanumeric tokens for secret keys.

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Signature

HMAC Signature Calculator

Generate HMAC-SHA256 signatures with custom secret keys for API authentication.

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Auth

API Key & Secret Generator

Produce high-entropy base64 and hex strings for environment variables.

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Network

Random MAC Address Creator

Generate random unicast MAC addresses formatted for networking mocks.

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Memorable

Memorable Passphrase Builder

Generate easy-to-remember yet mathematically robust multi-word passphrases.

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Hash

Crypto Digest & Salt Studio

Generate random cryptographically secure salting vectors for hashing rounds.

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Git Diff

Text & Code Diff Comparator

Visual comparison highlighting character additions and deletions side-by-side.

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Auth

JWT Token Inspector

Decode JWT header and payload claims with live expiration status.

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DevOps

Cron Expression Explainer

Translate 5-part cron syntax into human sentences with presets.

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CSS

CSS Box-Shadow Studio

Visual sliders for offsets, blur, and spread with instant CSS copy.

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Regex

Regex Sandbox & Matcher

Test regular expressions against test strings with flag controls.

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Reference

HTTP Status Codes Reference

Fast searchable reference guide for standard 2xx, 3xx, 4xx, and 5xx response headers.

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Speed

CSS Minifier & Cleaner

Compress CSS styles and strip comments to reduce asset load times.

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Format

JavaScript Code Formatter

Clean up messy minified JavaScript with standardized tab indentations.

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Color

HEX to RGB / HSL Converter

Interactive color spectrum picker with instant HEX, RGBA, and HSL copy formats.

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SEO

Meta Tag & OpenGraph Builder

Generate Twitter Cards and Facebook OpenGraph HTML tags with live social previews.

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Minify

HTML & SVG Markup Minifier

Strip redundant tags, whitespace, and comments from production HTML templates.

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Inspect

URL Query Parameter Inspector

Parse deep UTM tracking queries and complex URL parameters into readable keys.

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