Free developer tools
A growing set of fast, privacy-first utilities for SSH, Linux, and DevOps work. They run in your browser - nothing is uploaded, no account required.
Explore Our Free SSH, Linux & DevOps Tools
Chmod Calculator
Convert Linux file permissions between octal and symbolic notation and copy the chmod command.
SSH Key Generator
Generate Ed25519 or RSA key pairs in your browser. Nothing is uploaded.
SSH Config Generator
Build a clean ~/.ssh/config from hosts, ports, identities, and jump hosts.
SCP / Rsync Builder
Construct scp and rsync file-transfer commands without memorizing the flags.
SSH Tunnel Generator
Generate local, remote, and dynamic (SOCKS) SSH port-forwarding commands.
PPK to OpenSSH Converter
Convert a PuTTY .ppk key to the standard OpenSSH format for ssh and scp.
OpenSSH to PPK Converter
Convert an OpenSSH key to PuTTY .ppk format for PuTTY, Pageant, and WinSCP.
SSL Certificate & CSR Decoder
Decode certificates, CSRs, and chains - expiry, SANs, fingerprints, chain order. Nothing uploaded.
Cron Expression Generator
Build and decode crontab schedules with a plain-English preview.
Nginx Config Generator
Generate an nginx server block for a reverse proxy, static site, SPA, or PHP - with SSL.
Base64 Encoder / Decoder
Encode and decode Base64 - text, files, and data URIs - with URL-safe and UTF-8 support.
curl Command Builder
Assemble curl requests with headers, methods, auth, and data from a form.
Systemd Service Generator
Build a systemd .service unit with hardening, resource limits, and an optional timer.
Uptime / SLA Calculator
Turn an SLA percentage into allowed downtime per day, month, and year.
CIDR / Subnet Calculator
Calculate network range, mask, and host counts from CIDR notation.
htpasswd Generator
Create bcrypt/apr1 basic-auth credentials for nginx and apache.
YAML to JSON Converter
Convert YAML to formatted JSON in your browser - indent, sort keys, multi-document. Nothing uploaded.
JSON to YAML Converter
Convert JSON to clean, readable YAML in your browser - 2 or 4 space indent, sort keys. Nothing uploaded.
YAML Validator
Validate YAML with schema checks for Kubernetes, Compose, GitHub Actions, and Ansible - precise errors, lint warnings, one-click format. Nothing uploaded.
DNS Record Lookup + SPF/DMARC/DKIM Checker
Look up DNS records and audit SPF, DMARC, DKIM, MX, MTA-STS, and BIMI - pass/fail with fixes. Runs from your browser via DNS-over-HTTPS.
JWT Decoder & Verifier
Decode a JWT and verify its signature - header, payload, claims, and expiry, with HS256/RS256/ES256/PS256 support. Nothing uploaded.
VPS Security Scanner
Scan a server for exposed ports, weak TLS, missing security headers, and email-spoofing gaps - graded A to F with fixes. Only public hosts, nothing stored.
Why Use CtrlOps Developer Tools?
CtrlOps tools are built for engineers who want quick answers without the friction. Every utility runs entirely in your browser, so your keys, configs, and commands never leave your machine. There is nothing to install and no account to create - just open a tool and get to work.
- 100% Browser-BasedEverything runs client-side in your browser - no servers, no processing queues.
- No Sign-Up RequiredNo accounts, no email, no paywalls. Open a tool and start using it instantly.
- Privacy-First ProcessingYour keys, configs, and commands never leave your device or get uploaded.
- Fast & FreeLightweight, instant results, and completely free with no usage limits.
- Cross-Platform CompatibleWorks on any modern browser across macOS, Linux, and Windows.