Image Format Conversion

Convert images to modern formats while preserving quality and reducing file size. Perfect for social media, websites, and optimized web performance. Supports next-generation formats including WebP and AVIF.
Convert Images to WebP Reduce file size without sacrificing image quality Convert Images to PNG Convert images to the lossless PNG format Convert Images to JPG Convert images to the widely supported JPG format Convert Images to AVIF Convert images to the highly compressed AVIF format

Image Processing & Editing

Resize, crop, or clear image backdrops instantly. Includes privacy tools such as pixelation and blurring to mask confidential areas.
Resize ImageChange dimensions Crop ToolRounded corners & free aspect Square Image MakerAdd padding for social media Photo FiltersColor correction & effects Brightness & ContrastAdjust lights & shadows Monochrome ConverterBlack & white or sepia effects Blur & PixelateHide personal information Transparent BackgroundMake specific colors transparent Add Text to ImageOverlay custom typography Add WatermarkProtect assets with copyright Rotate Image90-degree & custom rotation Flip ImageHorizontal & vertical mirror Overlay ImagesMerge two photos together

Color, Analysis & Comparison

Essential design utilities, including color code conversion and visual comparison tools to analyze differences between two files.
RGB → HEXConvert color codes HEX → RGBConvert color codes Color PickerExtract colors from your screen Color Code ListColor names and hex codes Image ComparisonCompare two images side-by-side Image MeasureMeasure dimensions in pixels

PDF & Document Utilities

Merge PDF files or extract them into separate graphics without uploading sensitive documentation to third-party file structures.
Merge PDFCombine files into one document Image → PDFConvert photos to PDF format PDF → ImageExtract PDF pages into JPG/PNG

Other Handy Utilities

Everyday productivity micro-tools including QR code construction and quick Exif metadata stripping.
QR Code GeneratorTurn URLs or text into QR Favicon GeneratorGenerate .ico icon assets Remove Exif DataStrip location & camera metadata Pixel Art MakerDraw custom pixel graphics

Text & Writing Utilities

Character counters and formatting utilities tailored for report composition or programming tasks. Processed entirely locally.
Word & Character CountCount letters, lines, and blocks Text Search & ExtractIsolate specific patterns or spaces Whitespace & Line CleanerBatch strip unnecessary characters Special CharactersQuick-copy symbols for web design JSON/XML FormatterPrettify code structures

Calculators

Quickly add or subtract time intervals, or process binary/hex conversions required for computer science calculations.
Time CalculatorMix time values and arithmetic Radix ConverterConvert Binary, Octal, Dec, & Hex

Electrical & Electronic Engineering

Comprehensive calculation tools for students, hobbyists, and professional engineers. Supports color code configurations, Ohm's law metrics, and utility bills.
4-Band Resistor CodeCalculate resistance from bands 5-Band Resistor CodeDecode precision resistors Equivalent ResistanceSeries & parallel configurations Ohm's Law CalculatorCompute V, I, R, and Power Electricity Cost CalculatorDetermine kWh consumption & rates RLC Circuit CalculatorImpedance & phasor diagrams AC Power Multi-CalcReal, reactive, and apparent power Logic Circuit SimulatorExperiment with digital logic gates

Articles

Explore in-depth guides covering image formats such as JPEG, PNG, WebP, AVIF, and HEIC. Learn about image compression, optimization, and the best format for every use case.
Image File Guide Learn about image formats, compression, and optimization Image File Formats Compare JPEG, PNG, WebP, AVIF, and more What Is Image Optimization? Improve website performance with optimized images What Is Image Compression? Learn how image compression reduces file size JPEG vs. PNG Which image format should you choose? What Is JPEG? A complete guide to the most popular photo format What Is PNG? The best format for transparency and lossless quality What Is WebP? A modern image format for faster websites What Is AVIF? Features and benefits of the next-generation image format What Is HEIC? Learn about the default image format used on iPhone What Is GIF? Everything you need to know about animated images What Is SVG? Scalable vector graphics that stay sharp at any size

About HaruTools Lab

HaruTools Lab is a collection of browser-based tools designed to make everyday digital tasks simpler and more accessible. The site provides lightweight utilities for image processing, text manipulation, calculations, file conversion, and other common tasks that can be useful in everyday work, study, and creative activities.

Our goal is to provide practical tools that can be used directly in a web browser without requiring users to install specialized software or create an account. We focus on making each tool straightforward to understand and easy to use, including for users who may not have extensive technical knowledge.

Our Approach to Tool Development

HaruTools Lab is developed with an emphasis on simplicity, usability, and transparency. Each tool is designed for a specific task so that users can understand what the tool does and use it without unnecessary steps.

We also review and improve the tools over time based on technical requirements, browser compatibility, and usability considerations. As web technologies and browsers change, we aim to keep the tools functional and maintainable rather than simply publishing one-time utilities.

Browser-Based Processing and Data Privacy

Many HaruTools Lab utilities are designed to perform processing directly within the user's browser. For tools that use client-side processing, files and input data are handled locally by the browser rather than being sent to a remote processing server.

The actual processing method can vary depending on the individual tool, so users should refer to the information provided on each tool page when handling sensitive or private data. We aim to clearly explain how each tool processes user-provided information wherever that information is relevant to the tool's operation.

Free and Accessible Tools

HaruTools Lab is intended to provide useful utilities that can be accessed without creating an account or installing dedicated software. Most tools are available free of charge and are designed to work with modern desktop and mobile browsers.

The site is intended for a wide range of users, including web designers, developers, students, creators, and people who simply need a convenient tool for an occasional task.

Why We Build These Tools

Many small digital tasks do not require large or complicated software applications. However, finding a suitable tool for a simple conversion, calculation, formatting task, or image operation can still take time.

HaruTools Lab was created to provide simple utilities for these everyday situations. Instead of requiring users to install software or learn a complicated interface, we aim to make individual tasks available through focused browser-based tools.

Frequently Asked Questions

Q. Do I need to create an account?

A. Most HaruTools Lab utilities can be used without creating an account or signing in. Users can open the relevant tool and begin using it directly in their browser.

Q. Do I need to install software?

A. No installation is required for the browser-based tools provided by HaruTools Lab. A modern web browser is generally sufficient to use the tools.

Are my files uploaded to a server?

A. Many of our tools perform processing locally in the browser. However, processing methods can differ between tools, so please check the individual tool page for information about how your data is handled.

Can I use the tools on a smartphone or tablet?

A. Many HaruTools Lab tools are designed to work on modern smartphones and tablets as well as desktop computers. The available functions and interface may vary depending on the device, browser, and individual tool.

Are the tools free to use?

A. HaruTools Lab provides its online utilities free of charge. If a particular tool has different usage conditions, those conditions will be indicated on the relevant tool page.

What should I do if a tool does not work correctly?

A. First, make sure that your browser is up to date and try refreshing the page. Browser extensions, content blockers, or differences in browser support may sometimes affect how a tool operates. If the problem continues, please contact us through the site's contact page and provide details about the problem, including the tool you were using and, when possible, your browser and device.

Continuous Improvement

HaruTools Lab is an ongoing project. We plan to continue improving existing utilities, correcting technical issues, improving browser compatibility, and adding tools that address practical everyday needs.

Our aim is not simply to provide a large number of tools, but to build a useful collection of reliable and understandable browser-based utilities that people can return to when they need them.