Functional useThis web is used to: apply for free SSL/TLS domain name certificates (RSA, ECC/ECDSA) for HTTPS from Let's Encrypt , ZeroSSL , Google and other certificate authorities that support the ACME protocol, and support multiple domain names and wildcard pan-domain names; Simply operate on a modern browser to obtain a domain name certificate in PEM format, does not depend on the operating system environment, does not need to download and install software, and is purely manual,
数据安全除了你指定证书颁发机构的 ACME 接口地址外，本网页客户端不会向其他任何地址发送数据。
Data securityExcept for the ACME interface address of the certificate authority you specify, this web client will not send data to any other address.
证书过期提醒由于本网页客户端不支持自动续期，需注意在证书过期前重新申请新证书。
Certificate Expiration Risk AlertSince this web client can only be operated manually and does not support automatic renewal, you should pay attention to apply for a new certificate before the certificate expires.
步骤一：选择证书颁发机构Step 1: Select a Certificate Authority
Let's Encrypt:
请按照下面的操作步骤提示进行申请即可得到证书，证书有效期90天。Please follow the operation steps prompts below to apply, and you can get the certificate, which is valid for 90 days.
ZeroSSL:
此URL可能需要先根据下面的提示进行操作来消除跨域不能访问的问题。This URL may need to be operated according to the prompts below to eliminate the problem of cross-domain inaccessibility.申请证书前，你需要根据ZeroSSL的官方文档，先注册ZeroSSL账号并生成一个EAB凭据，每次申请证书时使用此EAB凭据，按照下面的操作步骤提示进行申请即可得到证书，证书有效期90天。Before applying for a certificate, you need to follow ZeroSSL's official documents, register a ZeroSSL account and generate an EAB credential, and use this EAB credential every time you apply for a certificate, follow the operation steps prompts below to apply, and you can get the certificate, which is valid for 90 days.[2026-01]ZeroSSL证书签发服务可能不稳定，如果反复出现重试或长时间等待，第二天再试可能恢复正常。[2026-01] ZeroSSL certificate issuance service may be unstable. If you experience repeated retries or long wait times, try again the next day. It may return to normal.
Google Trust Services:
此URL可能需要先根据下面的提示进行操作来消除跨域不能访问的问题。This URL may need to be operated according to the prompts below to eliminate the problem of cross-domain inaccessibility.申请证书前，你需要根据Google的官方文档，在Google Cloud中生成一个EAB凭据，每次申请证书时使用此EAB凭据，按照下面的操作步骤提示进行申请即可得到证书，证书有效期90天。Before applying for a certificate, you need to follow Google's official documents, generate an EAB credential in Google Cloud, and use this EAB credential every time you apply for a certificate, follow the operation steps prompts below to apply, and you can get the certificate, which is valid for 90 days.注意：因为同一个Google EAB凭据只能绑定到一个ACME账户（私钥），因此你在首次申请证书时，必须同时保存好在第二步操作中新创建的或手动填写的ACME账户私钥，下次申请证书时使用此EAB凭据必须和已保存的ACME账户私钥一起使用。Note: Because the same Google EAB credential can only be bound to one ACME account (Private key), when you apply for a certificate for the first time, you must also save the newly generated or manually filled ACME account private key in the second step, this EAB credential must be used together with the saved ACME account private key when applying for a certificate next time.
温馨提示：如果上次申请过证书，可以拖拽已下载保存的记录LOG文件到本页面，将自动填充上次的配置信息。Reminder: If you have applied for a certificate last time, you can drag and drop the downloaded and saved record LOG file to this page, and the last configuration information will be automatically filled in.
*证书中要包含的域名：Domain name to be included in the certificate:
一个证书可以包含多个域名（支持通配符），比如填写：14FZ.com, *.14FZ.com, b.com, *.b.com；第一个域名将作为证书的通用名称（Common Name）；带通配符的域名只支持DNS验证，其他域名支持上传文件验证；注意：填了*.14FZ.com时，一般需要额外填上14FZ.com。A certificate can contain multiple domain names (wildcard are supported), for example, fill in: 14FZ.com, *.14FZ.com, b.com, *.b.com; the first domain name will be used as the Common Name of the certificate; Domain names with wildcard only support DNS verification, and other domain names support upload file verification ; Note: When *.14FZ.com is filled in, it is generally necessary to fill in 14FZ.com additionally.
*证书的私钥：Private key of certificate:
生成或填写的私钥仅用于ACME接口签名，支持RSA(2048位+)、ECC(曲线)私钥；注意：证书私钥的类型决定了申请到的证书是RSA证书还是ECC(ECDSA)证书，ECC类型体积小加密性强；证书签发后在部署到服务器时，需使用到此私钥；建议每次申请证书时均生成新的证书私钥。The generated or filled private key is only used for ACME interface signature, and supports RSA (2048-bit+) and ECC ( curve) private keys; Note: The type of certificate private key determines whether the applied certificate is an RSA certificate or a ECC(ECDSA) certificate, RSA type is more widely applicable and more common; this client will not save or send this private key to anyone else; this private key needs to be used when deploying to the server after the certificate is issued; it is recommended to generate a new certificate private key every time you apply for a certificate.
*ACME账户的私钥：Private key of ACME account:
私钥仅用于ACME接口签名，支持RSA(2048位+)、ECC(曲线)私钥；账户私钥类型对证书无影响；本客户端不会对此私钥进行保存或发送给其他任何人；一个私钥相当于一个账户，可用于吊销已签发的证书；建议每次申请证书时使用相同的一个私钥（这样短期内多次申请证书时，验证域名所有权的参数极有可能会保持相同），不过每次都生成一个新的私钥大部分情况下也不会有问题。The generated or filled private key is only used for ACME interface signature, and supports RSA (2048-bit+) and ECC ( curve) private keys; the account private key type has no effect on the certificate; this client will not save or send this private key to anyone else; A private key is equivalent to an account and can be used to revoke an issued certificate; it is recommended to use the same private key every time you apply for a certificate (in this way, the parameters used to verify the domain name ownership are likely to remain identical when multiple certificate applications are made in a short period of time); However, generating a new private key every time will not be a problem in most cases.注意：如果你选择的ACME服务（比如Google）要求提供EAB凭据并且限制了同一个EAB凭据只能绑定到一个ACME账户（私钥），那每次使用此EAB凭据时必须使用相同的一个私钥（首次时如果新创建了私钥，此新私钥需立即保存起来下次和此EAB凭据一起使用）。Note: If the ACME service you choose (such as Google) requires EAB credentials and limits the same EAB credentials to only one ACME account (private key), then you must use the same private key every time you use this EAB credential (if you generate a new private key for the first time, this new private key needs to be saved immediately and used with this EAB credential next time).
*ACME账户的联系邮箱：Contact email of ACME account:
此邮箱地址用于证书颁发机构给你发送证书过期前的续期通知提醒。This email address is used by the certificate authority to send you emails, such as a reminder of renewal notice before the certificate expires.
EAB凭据：EAB Credentials:
当前ACME服务要求提供外部账号绑定凭据（External Account Binding），比如ZeroSSL：你可以在ZeroSSL的管理控制台的 Developer 中获得此凭据，所以你需要先注册一个ZeroSSL的账号。The current ACME service requires external account binding credentials, such as ZeroSSL: You can obtain this credentials in the Developer of the ZeroSSL management console, so you need to register a ZeroSSL account first.
请给每个域名选择一个你合适的验证方式（推荐采用DNS验证，比较简单和通用），然后根据显示的提示完成对应的配置操作。Please select a suitable verification method for each domain name (DNS Verify is recommended, which is relatively simple and common), and then complete the corresponding configuration operations according to the displayed prompts.
请每个域名选择好对应的验证方式，根据显示的提示进行对应的配置操作；必须所有域名配置完成后，再来点击下面的“开始验证”按钮进行验证，如果验证失败、或验证耗时太久，需要返回第二步重新开始操作。Please select the corresponding verify method for each domain name, and perform the corresponding configuration operation according to the displayed prompts; after all domain names are configured, click the "Start Verify" button below to verify, if the verify fails or takes too long, you need to go back to the step 2 Start the operation.
开始验证Start Verify取消Cancel重试Retry
步骤四：下载保存证书PEM文件Step 4: Download and save the certificate PEM file
必须保存此文件，请点击下载按钮下载，或者将证书文本内容复制保存为文件（PEM纯文本格式）；文件名后缀可改成 .crt 或 .cer，这样在Windows中能直接双击打开查看。本PEM格式文件已包含你的域名证书、和完整证书链，文本中第一个CERTIFICATE为你的域名证书，后面的为证书颁发机构的中间证书和根证书，如过有需要你可以自行拆分成多个.pem文件。This file must be saved, please click the download button to download, or copy the text content of the certificate and save it as file (PEM plain text format); the file name suffix can be changed to .crt or .cer , so that it can be directly double-clicked to open and view in Windows. This PEM format file already contains your domain name certificate and complete certificate chain. The first CERTIFICATE in the text is your domain name certificate, followed by the intermediate certificate and root certificate of the certificate authority, if necessary, you can split it into multiple .pem files.
下载保存Download
*保存证书私钥KEY文件：Save the certificate private key KEY file:
请点击下载按钮下载，或者将私钥文本内容复制保存为文件（PEM纯文本格式，.key后缀可自行修改成.pem）。如果第二步操作中你手动填写了证书私钥，此处的证书私钥和你填写的是完全一样的，可以不需要重复保存；如果你是新创建的证书私钥，则你必须下载保存此证书私钥文件。Please click the download button to download, or copy and save the text content of the private key as file (PEM plain text format, the .key suffix can be modified to .pem by yourself). If you manually filled in the certificate private key in the step 2, the certificate private key here is exactly the same as what you filled in, and you don’t need to save it repeatedly; if you are a newly created certificate private key, you must download and save it This certificate private key file.
下载保存Download
*保存记录LOG文件：Save the record LOG file:
建议下载保存此文件，本记录文件包含了所有数据，包括：证书PEM文本、证书私钥PEM文本、账户私钥PEM文本、所有配置参数。下次你需要续签新证书时，可以将本记录文件直接拖拽进本页面，会自动填写所有参数。It is recommended to download and save this file. This record file contains all data, including: certificate PEM text, certificate private key PEM text, account private key PEM text, and all configuration parameters. Next time you need to renew a new certificate, you can drag and drop the record file directly into this page, and all parameters will be filled in automatically.
下载保存Download
你需要其他格式的证书文件？Do you need certificate files in other formats?
大部分服务器程序支持直接使用 + 来配置开启HTTPS（比如Nginx），如果你需要 *.pfx、*.p12 格式的证书（比如用于IIS），请用下面命令将PEM证书转换成 pfx/p12 格式：Most server programs support directly using + to configure and enable HTTPS (such as Nginx). If you need a certificate in *.pfx or *.p12 format (such as for IIS), please use the following command to convert the PEM certificate Convert to pfx/p12 format:
openssl pkcs12 -export -out .pfx -inkey -in
IIS证书链缺失？IIS certificate chain missing?
对于Windows IIS服务器，你需要将证书链安装到“本地计算机”的“中间证书颁发机构”中；请将PEM证书中的所有证书拆分成单个PEM文件（后缀改成.crt或.cer），然后将系统中缺失的中间证书双击打开然后安装进去；详细参考：For Windows IIS server, you need to install the certificate chain into "Intermediate Certification Authorities" in "Local Computer"; please split all certificates in PEM certificate into a single PEM file (change the suffix to .crt or .cer), then double-click to open the missing intermediate certificate in the system Then install it; detailed reference:http://support.microsoft.com/kb/954755