How are recommended tools selected?
The collection favors broadly useful tools, clear workflows, and utilities that provide immediate value without a complicated setup.
Recommended tools
Browse by category
15 categoriesRecommended tools
8 matching tools
Showing 8/173 tools · Recommended tools
JSON Formatter
Turn minified, messy, or hard-to-read JSON into a scannable hierarchy with error hints and field statistics.
Developer Tools
Unit Converter
A complete converter for 20 categories including length, mass, temperature, area, volume, speed, data, pressure, and energy, with batch conversion, smart precision, comparison tables, favorites, and history.
Calculators & Converters
QR Code Tool
Generate text, URL, WiFi, and contact QR codes locally in the browser, or upload an image to decode a QR code.
Encoding
Image Compressor
Compress PNG, JPG, and WebP images locally in the browser with quality, size, and format controls.
Image Tools
HEIC to JPG Converter
Decode HEIC and HEIF photos locally, control JPEG quality and dimensions, remove attached metadata, and download individual files or a ZIP.
Image Tools
PDF Compressor
Compress PDF pages locally with quality and resolution presets, optional grayscale output, and a before-and-after size preview.
PDF Tools
Percentage & Discount Calculator
Calculate percentages, price changes, sequential discounts with optional tax, reverse discounts, gross margin and markup locally. See the formula and export results.
Calculators & Converters
Invoice & Estimate Generator
Create invoices and estimates with your logo, line items, discounts, user-entered tax and partial payments. Choose document language, currency and paper independently, then download a private local PDF.
Productivity & Habits
Recommended tools for common, high-value tasks
This shortlist highlights practical starting points across ToolRen. It is designed for tasks people return to often, while the full directory remains available when you need a more specialized workflow.
Frequently asked questions
Are more specialized tools available?
Yes. Open the complete directory or a category page to find focused tools for formats, protocols, databases, media, and other specific jobs.