全套哈希秒算 (支持超大文件流式校验)
实时秒算文本哈希，或拖拽数 GB 超大文件进行流式分块无感校验，不占内存。
高强度安全密码生成
基于高熵随机发生器生成高强度防撞安全密码，支持自定义规则与长度。
批量唯一标识符 (UUID / NanoID)
批量极速生成符合 RFC4122 标准的 UUID v4 或 21 位轻量 NanoID 标识符。
Base64 编解码 (支持 UTF-8 & URL-Safe)
标准 Base64 编解码，完整支持 UTF-8 多字节字符与 URL-Safe 网页安全规范。
多字符集编码与 Hex 互转
在 GBK、GB2312、UTF-8 字符集与 Hex 十六进制字节序列间自由互转，排查乱码必备。
URL 编解码 / HTML 实体 / Unicode
URL 百分比编解码、HTML 实体字符转义与 \uXXXX Unicode 编码相互转换。
数据格式互转 (JSON / YAML / TOML)
纯本地双向转换与美化格式化 JSON、YAML、TOML 结构化配置数据。
JWT (JSON Web Token) 本地隐私解析
在本地完全离线解码 JSON Web Token，解析 Header 与 Payload 并校验过期时间。
二维码即时生成定制
纯本地毫秒级渲染矢量二维码，可自定义容错率、前景色、背景色并导出 SVG/PNG。
一维条形码生成
生成 Code 128、EAN-13、Code 39、Data Matrix、PDF 417 等常见工业物流条码。
图片二维码 / 条形码本地极速识别解码
上传或拖拽包含一维条码或二维码的图片，利用 WASM 内核纯本地极速识别解码。
证件照全屏密集防盗水印
为身份证、护照、执照等重要证件图片压制密集倾斜防盗文字水印，防止冒用盗用。
EXIF 隐私元数据检测与一键擦除
深度检查照片中包含的相机型号、拍摄参数与危险的 GPS 经纬度位置，一键剥离擦除。
纯本地格式互转 (可制 Favicon.ico)
在 WebP、ICO (Favicon)、PNG、JPEG、BMP 之间纯本地高速互转，绝无上传损耗。
Developer Security & Utilities Toolbox Online
Calculate cryptographic file hashes (MD5, SHA-256, SM3), generate hardware-grade random passwords, decode JWT tokens offline, add anti-theft ID watermarks, and convert image formats directly in your browser. Powered by WebAssembly and client-side crypto primitives, BoxyKit Toolbox guarantees 100% data privacy with zero server uploads.
Essential Tools for Security & Daily Workflow
Multi-GB Streaming File Hashes
Compute MD5, SHA-1, SHA-256, SHA-512, CRC32, and SM3 hashes. Stream multi-gigabyte ISOs and videos smoothly with zero memory bloat.
Hardware CSPRNG Password Generator
Generate cryptographically secure passwords, passphrases, and UUID/NanoID tokens using hardware-backed cryptographic random number generators.
Offline JWT & Encoding Inspector
Decode JSON Web Tokens locally to inspect header and payload claims without exposing Bearer tokens to the web. Convert Base64, Hex, and GBK charsets.
Anti-Theft ID Watermark & Images
Stamp dense, customized anti-theft watermarks on ID cards and licenses using HTML5 Canvas. Convert images to WebP, PNG, JPEG, and 32x32 Favicon (.ico).
How to Use BoxyKit Toolbox
Select Tool
Browse tools by category (Cryptography, Encoding, Barcode/QR, Image Security) or use the sidebar search bar.
Input Data or Files
Paste text strings, drag and drop documents/images, or customize password generation parameters.
Pure-Local Computation
Calculations run instantaneously in browser WebAssembly memory without sending any byte over the wire.
Copy or Download
One-click copy hashes, tokens, and formatted output, or download watermarked images and converted files.
Hardware-Accelerated Client-Side Cryptography
BoxyKit Toolbox leverages client-side WebAssembly (WASM) and browser-native Web Cryptography APIs. By reading large files via chunked FileReader ArrayBuffers, hashing routines run in linear memory without exhausting RAM. Sensitive secrets, credentials, ID cards, and proprietary payloads are completely shielded from server logging and interception.