Dev Tools for DevOps Engineers
DevOps engineers spend their days in configuration files, CI/CD pipelines, network infrastructure, SSL certificates, and monitoring systems. The tools in this collection address the daily friction points: parsing and validating YAML for Kubernetes manifests, decoding SSL certificates before they expire, debugging cron schedules, calculating subnet ranges for VPC design, and converting data between formats that different tools expect. All tools run in your browser — no CLI setup, no installation, no context switching.
Format and beautify YAML with consistent indentation (2 or 4 spaces).
Validate YAML syntax and preview the parsed JSON representation.
Convert YAML to JSON with proper structure and types.
Pretty-print and format JSON with proper indentation.
Check if your JSON is valid and find syntax errors.
Parse cron expressions and see next execution times in plain English.
Build cron expressions visually with dropdowns and presets, then get the expression and human description.
Paste a PEM certificate and decode its subject, issuer, validity dates, SANs, and more.
Find out how many days until an SSL certificate expires. Paste a PEM or enter a date.
Fill in your details and get a ready-to-run openssl command to generate a CSR and key.
Paste a PEM CSR and decode its subject, public key algorithm, and signature algorithm.
Calculate network address, broadcast, hosts, and subnet mask from IP/CIDR notation.
Calculate CIDR notation, total IPs, and subnet mask from a start and end IP address.
Validate IPv4 and IPv6 addresses with class, scope, and private/public detection.
Validate docker-compose YAML syntax and check for common configuration issues.
Generate a production-ready multi-stage Dockerfile by selecting base image, port, and entry command.
Format and indent nginx configuration files with properly nested blocks.
Generate Nginx rewrite and return rules for URL redirects.
Generate Apache .htaccess files with redirect rules, caching, security headers, and gzip compression.
Generate SHA-1, SHA-256, SHA-384, and SHA-512 cryptographic hashes from any text.
Upload a file and calculate its MD5, SHA-1, SHA-256, and SHA-512 checksums.
Convert Unix timestamps to human-readable dates and vice versa.
FAQ
- How do I quickly validate a Kubernetes YAML manifest?
- Use the YAML Validator to check the YAML syntax and structure of your Kubernetes manifests before applying them. The YAML Formatter will also clean up indentation inconsistencies that often cause "unexpected mapping" errors in kubectl apply.
- How do I check when an SSL certificate expires?
- The SSL Certificate Decoder shows all certificate details including expiration date, domain coverage (SANs), and the issuing CA. The SSL Expiry Calculator lets you track multiple certificate expiration dates. Use Cert Fingerprint Calculator to verify a certificate matches the expected fingerprint.
- What networking tools are most useful for cloud infrastructure work?
- The Subnet Calculator computes network ranges, broadcast addresses, and usable hosts from CIDR notation — essential for AWS VPC and Azure VNET subnet planning. IP Subnet Range shows all addresses in a given block. IP Address Validator checks both IPv4 and IPv6 addresses for validity.