PrismKit加密與資安憑證解碼器憑證解碼器在瀏覽器中執行本機複製連結Markdown解碼 PEM 憑證或 CSR，查看其主體、簽發者、有效期間、名稱、金鑰與指紋。自簽憑證產生器Create a self-signed X.509 certificate and RSA private key for local development and testing.PDF 簽章檢查器Inspect the digital signatures embedded in a PDF and check whether the file changed after it was signed.