About ToolDuck

From developer utilities and JSON tools to mock APIs, resume tools, image tools and PDF utilities, ToolDuck brings practical tools into one simple place.

Why ToolDuck

Free to use

Every tool is free, and none of them require an account.

Fast and simple

Open a page, drop in your input, take the result. That is the whole interaction.

Privacy-conscious

Where a tool can do its work in the browser, that is where it does it.

Browser-first where possible

Most tools process your input on your own device and never upload it.

For developers and everyday users

The same site covers a JSON diff, a resume, and resizing a photo for a form.

No unnecessary complexity

No sign-up walls, no daily caps, no features that exist only to pad a page.

Many of the tools are built to process information directly in the browser, so you do not have to upload sensitive data just to run a routine task. That is a deliberate design choice rather than an absolute guarantee: a few features genuinely need a server — the mock API, and the optional AI assistance in the resume tools — and in those cases the page tells you what is sent before you use it. Where a tool says your data stays on your device, it means exactly that.

About the Creator

Lokesh Deshmukh · Software Developer

ToolDuck is created by Lokesh Deshmukh, a software developer and technology professional with experience building software applications and developer-focused solutions across mobile, web and backend platforms.

The technical background behind the site is primarily Android and Kotlin, alongside iOS and cross-platform work in React Native and Flutter. On the server side that is Java, PHP, Node.js and Spring Boot, with AWS for deployment — and JavaScript and modern web technologies holding the two ends together.

Professional Profile

Lokesh works across mobile, web and backend technologies and has experience building and leading software development projects.

View LinkedIn Profile View GitHub Profile

Technology Stack

Mobile

Android
Kotlin
iOS
React Native
Flutter

Backend

PHP
Node.js
Spring Boot
Java

Cloud

Web

JavaScript
HTML
CSS
WordPress

Other

Git
REST APIs
API development
Developer tooling

Building ToolDuck

ToolDuck started with a simple idea: developers and everyday users often need small utilities for tasks that should take seconds, not require installing another application.

ToolDuck brings these utilities together in one place, with a focus on useful functionality, straightforward interfaces and fast browser-based tools. The developer tools cover JSON formatting and comparison, UUID generation, encoding and decoding, hashing and mock APIs. Beyond that there are resume tools for building and checking a CV, and image tools for compressing, resizing and converting pictures — with more being added over time.

What is available now

Image Tools — 11 tools, compress, resize, convert, crop and merge images.
PDF Tools — in progress
Resume Tools — 4 tools, build, check and improve your resume.
Developer Tools — 6 tools, handy utilities for developers.

GitHub

Some of my development work and projects are available on GitHub.

View GitHub Profile (opens GitHub in a new tab)

Explore ToolDuck

Every tool is free and needs no account. A few places to start:

Feedback and contact

Found a bug, or a tool that does not behave the way you expected? Get in touch — reports about specific tools are the most useful kind.