No signup. No uploads. Just useful tools.
Everyday tools.
Made easy.
Calculate, format, resize, and convert. Find the tool you need and get back to your day.
Start with a useful tool
QR Code Generator →
Create static QR codes for links, text or Wi-Fi and save PNG or SVG.
Image ToolsHEIC to JPG →
Convert a HEIC still photo to JPEG locally with a result preview.
Image ToolsImage Compressor →
Adjust JPEG quality or fit a measured maximum file size, with optional resizing.
FormattersCSV to JSON →
Convert CSV headers and records to JSON.
Text ToolsWord Counter →
Count words, characters, and lines.
FormattersJSON Formatter →
Validate, format, and minify JSON.
Complete a task with a checked example
Prepare a photo for an upload form
Convert a supported HEIC still, inspect its JPEG copy, then check the destination’s pixel and byte limits.
Share a link as a static QR
Generate PNG or SVG, decode the saved sample and test the finished layout before printing.
Keep identifiers when converting CSV
Choose the separator, preserve values as strings and compare leading zeros and long IDs with the source.
Explore all tools
Calculators
Money, health, dates, and everyday numbers.
Formatters
Make structured text easier to read.
PDF Tools
Merge, extract, rotate, and create documents.
Image Tools
Convert, crop, rotate, and optimize pictures.
Text Tools
Count, clean, convert, and organize writing.
Audio Tools
Trim WAV recordings and draft English speech captions locally.
Your files and inputs stay with you
Tools process your input on your device. Calculator pages explain their formulas, examples, and limits. Financial and health results are estimates under the stated assumptions.
Understand the web, one idea at a time
Explore all visual lessons →Start with a question, follow the diagram, then test your understanding with an example. The lesson library also covers AI tools, passkeys and protected connections.
What does a web address tell you?
Separate the hostname, path, query and fragment. Practice encoding a value without changing the whole address.
Read the visual lesson →What happens after you open a link?
Follow a request and response, then see why a successful status and valid application data are separate checks.
Read the visual lesson →Where does an AI task actually run?
Understand local processing, model downloads and cloud fallback before choosing where to send a task.
Read the visual lesson →Learn with a practical example
Browse all guides →Spreadsheet workflow
Keep leading zeros and long IDs when converting CSV to JSON
Protect spreadsheet identifiers before export, preserve CSV values as strings and check the downloaded JSON against a worked example.
Image workflow
Fix an image upload error: format, dimensions and file size
Diagnose a rejected image, check the destination’s rules and produce a measured JPEG under a chosen maximum size.
Developer workflow
Format JSON and fix common syntax errors
Make JSON readable, fix trailing commas and quoted keys, and check identifiers before copying or downloading.
Image workflow
Resize or compress? Prepare an image that fits
Understand pixels, file size and JPEG quality, then inspect the output before using it in a website or upload form.
Calculator workflow
Compare loan EMI and total interest together
Compare two fixed-rate repayment estimates using the same amount and rate, with explicit assumptions and a zero-interest check.
Image workflow
Create a static QR code: download, decode and check before printing
Reproduce a 512-pixel link QR, compare it with a verified sample, and troubleshoot scan failures without a tracking redirect or an account.