Free browser tools
These tools run entirely in your browser. Your files are not uploaded to any server. 免费工具,全部在浏览器本地运行,文件不上传。
Battery Pack Calculator
Series/parallel, kWh, Wh/kg, pack resistance, I²R heat, temperature rise and range from generic or custom cells. Share a link or export CSV.
电池包串并联、电量、能量密度、内阻、发热温升与续航估算,中英双语。
Local Toolbox
Images to PDF, merge images, Excel/CSV to PDF, compress and resize images.
图片转 PDF、拼图、Excel 转 PDF、图片压缩。
GPSR Label & Listing Builder
Generate EU GPSR product-safety info and warning labels in 8 languages. Pair it with the GPSR Seller Kit.
生成欧盟 GPSR 产品安全信息与 8 种语言警示标签。
Translations in the GPSR builder are AI-assisted; have a native speaker or your EU responsible person check them. Not legal advice.