Simple and powerful tools for everyday tasks
A free, fast suite of web tools to generate beautiful custom QR codes, merge PDFs, validate and format JSON data, and convert or resize images. Processed entirely in your browser for absolute privacy.
QR Generator
Create custom QR codes from URLs, text, or contact data entirely in your browser.
Open ToolImage Converter
Convert between formats, resize, crop, rotate, and remove backgrounds from images.
Open ToolPDF Generator
A powerful local utility to merge, split, extract, and rotate pages from PDF files.
Open ToolJSON Formatter
Format, validate, and minify JSON strings securely without sending data to servers.
Open ToolBase64 Encoder
Encode text or files into Base64 format, or decode Base64 strings back to their original form.
Open ToolCSV & Parquet Viewer
Inspect, sort, filter, and analyze CSV and Parquet files locally in your browser up to 100MB.
Open ToolDeveloper's Corner
Explore in-depth engineering guides, technical deep dives, and system design resources.
Data Engineering
Mastering modern analytics architectures, core storage formats, transactional lakehouses, and low-level performance considerations.
Explore Topic →AI for Engineers
Practical AI knowledge for software engineers — from foundational concepts to building production-ready LLM applications, RAG pipelines, and AI-native systems.
Explore Topic →AI Engineering Use Cases
Real-world AI engineering use cases for software engineers — practical patterns, architectures, and production implementations using LLMs, RAG, agents, and AI-native system design.
Explore Topic →Inside JVM
Deep-dive execution mechanics of the Java Virtual Machine, covering classloaders, memory management layout, garbage collection sweeps, JIT compilation optimizations, and monitor locks.
Explore Topic →Data Structure And Algo
Comprehensive guides on essential data structures, algorithm patterns, and problem-solving techniques.
Explore Topic →System Design
In-depth tutorials on software architecture, design principles, database choices, and scaling complex systems.
Explore Topic →Java Interview Questions
A comprehensive guide to Core Java interview questions for beginners, covering OOPs concepts, collections, multithreading, and more.
Explore Topic →System Design Use Cases
Real-world system design architectures and use cases.
Explore Topic →Apache Kafka
Deep dive into Apache Kafka architecture, distributed event streaming, partition internals, storage mechanics, and producer-consumer guarantees.
Explore Topic →Tech Help Tools: Simple and Powerful Web Utilities
Welcome to Tech Help Tools, your go-to collection of simple and powerful tools for everyday tasks. We offer a suite of free, browser-based web utilities designed to streamline your development and document workflows. Whether you need to design advanced QR Codes, merge PDF documents, convert Word files, compile Markdown sheets, validate a JSON file, convert images, or decode Base64 and JWT payloads, our utilities make these tasks fast, simple, and powerful.
Advanced QR Code Generator
Design beautiful, high-quality QR codes customized perfectly for your brand. Support for custom vCard generation, embedded logos, distinct artistic SVG frames, adjustable pattern colors, and fine-grained offset controls. All QR designs are generated 100% locally on your browser without any server tracking.
Open ToolMerge & Generate PDF, Word & Markdown
Our PDF generator and merger utility allows you to seamlessly combine multiple documents (PDF, DOCX, MD) and images into a single clean PDF file. Reorder pages, compile custom markdown text, rotate cards, and export files instantly. All document rendering and compiling are executed local-only, ensuring absolute privacy for sensitive data.
Open ToolFormat, Validate & Minify JSON
Format, validate, prettify, and minify raw JSON data client-side. Parse payloads into an interactive tree, spot validation errors, and compress structures locally with absolute privacy.
Open ToolConvert, Crop & Edit Images
Quickly resize, crop, rotate, remove background, and convert images into formats like PNG, JPEG, WEBP, GIF, BMP, and ICO. Local AI-powered background removal and cropping run completely on your client browser, guaranteeing high speed and 100% privacy.
Open ToolSecure Base64 & JWT Utilities
Perform cryptographic Base64 encoding/decoding and inspect JWT headers and signatures instantly. These developer utilities run entirely on your browser client, offering safe tools to handle authentication tokens and binary data representation securely.
Open ToolAll Tech Help Tools are built with Next.js for instant page loads. By handling all operations inside your local sandbox, these simple yet powerful browser-based utilities keep your workspace secure and make everyday developer tasks a breeze.