HaruTools Lab

Instant tools right in your browser.
No registration required. Completely free web utilities for images, text, calculation, and electrical engineering.

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Image Compression & Conversion

Optimize your images for social media and faster website load times. Reduce file size while maintaining visual quality. Supports modern formats including WebP and HEIC.
Bulk Image CompressDrastically reduce file size PNG CompressionCompress with transparency Convert to WebPConvert to next-gen format WebP → JPGConvert to standard JPG WebP → PNGConvert keeping alpha channel JPG → PNGConvert to PNG format PNG → JPGConvert with white backdrop HEIC → PNGConvert iPhone photographs Video → GIFTurn video into animation

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

Why Choose HaruTools Lab?

HaruTools Lab is an expanding suite of over 50 lightweight online utilities built to help web designers, developers, students, and casual creators execute everyday processing tasks natively in their browser.

1. Secure Browser-Side Execution (Privacy Centric)

Unlike standard online conversion platforms, all computing tasks occur entirely within your web browser environment. Your images, PDFs, and data arrays are never uploaded or transferred to external servers. It is fully secure for corporate or education tasks.

2. No Sign-up & 100% Free for Commercial Use

No subscriptions, no registration, and no feature caps. All tools are completely free to use. Generated or processed elements can be utilized for commercial setups without any mandatory attribution or watermarks.

3. No Installation Required & Fully Responsive

Skip heavy software suites. As long as you have a modern web browser, HaruTools Lab operates seamlessly across Windows, macOS, iPhone, iPad, and Android hardware.

Frequently Asked Questions (FAQ)

Q. Are there hidden fees for utilizing these tools?

A. No, all utilities listed across HaruTools Lab are entirely free. There are no registration forms, pro features, or sudden paywalls.

Q. Do I need to create an account or sign in?

A. Not at all. Simply visit the tool's page and upload your assets to start working instantly. We do not gather personal identifiers or email accounts.

Q. Where are my files saved when I upload them?

A. They aren't. Our web architecture handles file rendering via client-side JavaScript. This means elements remain purely within your device sandbox and disappear once the browser tab is closed.

Q. Can I use the outputs for commercial distribution?

A. Yes. Any images, formatting corrections, or file outputs produced here are completely yours to use across blogs, social media distributions, print layout items, and software deployments.

Q. Does this site support mobile platforms?

A. Yes, every component features a flexible responsive grid. You can process your photography or check values via mobile or tablet devices just as you would on a desktop setup.

Q. What should I do if a tool fails to render or behaves unexpectedly?

A. Please verify that your web browser is updated to its latest release. Content blockers or strict private sandbox configurations may occasionally interfere with client-side canvas APIs. If issues persist, try executing the tool inside an alternate web browser.