New Tools

Batch Coordinate to Address Converter

Batch reverse geocode latitude and longitude coordinates into detailed addresses. Supports Excel upload and export, processing up to 500 records per batch.

Batch Address to Coordinate Converter

将批量地址解析为经纬度坐标，支持文本粘贴和Excel上传/导出，单批最高500条。

Batch Latitude & Longitude Converter

Batch convert coordinates between WGS84, GCJ02, and BD09 online. Supports text paste and Excel upload with easy data export.

Online Piano Keyboard

Play our free online virtual piano keyboard. Features selectable instrument tones, quick chord lookup, and MIDI/MP3 recording.

Room Measurement Calculator

逐间输入房间尺寸与门窗，自动计算面积并估算地砖、墙漆等材料用量

Internal Rate of Return (IRR) Calculator

计算内部收益率IRR与投资回收期，评估项目预期回报与回本速度。

NPV Calculator

计算净现值(NPV)，判断项目投资价值。

年金现值计算器

快速计算普通年金、预付年金和永续年金的现值与终值，同步输出年金现值系数和终值系数，辅助养老金、贷款或投资分析。

Break-Even ROI Calculator

输入利润率、退货率和其他成本占比，快速算出广告投放保本ROI与ROAS，附带敏感性分析，一眼看清安全线。

E-Commerce ROI Calculator

电商广告ROI/ROAS/盈亏分析计算器，考虑利润率、退货率和隐性成本，快速判断投流是赚是亏

Noise Detector Pro

专业噪音检测仪：A/C/Z计权，频谱分析，数据导出

Essay Paper Generator

Customize and generate blank A4 essay paper PDFs online. Features custom word count markers and headers for printable writing and manuscript paper.

JPG to ICO Converter

Free online JPG to ICO converter. Easily convert JPG images into multi-size ICO files containing up to 6 different dimensions for favicons and desktop icons.

PNG to ICO Converter

Free online PNG to ICO converter. Instantly convert PNG images to ICO icon files with 6 standard sizes automatically bundled for favicons and Windows icons.

JPG & AVIF Converter

Free online tool to convert between JPG and AVIF formats. Optimize image file sizes with secure, fast, in-browser processing.

PNG & AVIF Converter

Free online converter for bidirectional PNG and AVIF format conversion. Significantly reduce image file sizes while maintaining high quality.

JPG & WEBP Converter

Free online bidirectional converter for JPG and WEBP formats. Fast, secure, and processed entirely locally in your browser.

PNG ↔ WEBP Converter

Free online PNG ↔ WEBP bidirectional converter. Process images locally in your browser to reduce file size and protect your privacy.

HEIC to PNG Converter

Convert HEIC/HEIF images to PNG online for free. Preserves transparency and processes locally in your browser for maximum privacy and speed.

HEIC to JPG Converter

Convert iPhone HEIC images to standard JPG format. Processed locally in your browser with no uploads required.