DevOps & SRE Toolkit
Everything a DevOps engineer or SRE reaches for daily — cron scheduling, subnet math, secret generation, JWT inspection, API testing, and config encryption — collected in one place. Every tool runs entirely in your browser: no data leaves your machine, no account required, no install.
Featured Tool
Cron Expression Builder
Build and explain cron schedules in plain English
All Tools (32)
- Cron Builder
Build and explain cron schedules in plain English
- chmod Calculator
Convert Unix file permissions between octal and symbolic notation
- CIDR Calculator
Calculate network, broadcast, host range, and netmask for any CIDR block
- Regex Tester
Test regular expressions with live match highlighting
- JSON Formatter
Parse, validate, format, and minify JSON
- YAML Validator
Parse and validate YAML, see line and column errors
- SQL Formatter
Format SQL across multiple dialects
- Base64
UTF-8-safe Base64 encoder and decoder
- URL Encoder
Percent-encode and decode URI components
- Hash Generator
MD5, SHA-1, SHA-256, SHA-512, and HMAC
- HMAC
Compute HMAC-SHA-1, SHA-256, SHA-384, or SHA-512 with any secret
- File Hash
Hash a file and verify against an expected digest
- Password Generator
Crypto-secure random passwords
- Password Checker
Score password strength and entropy
- Diceware
Generate strong, memorable passphrases from the EFF Diceware wordlist (7,776 words)
- AES Crypt
AES-GCM encrypt and decrypt with passphrase
- TOTP
Generate Time-based One-Time Passwords from a base32 secret — RFC 6238 compatible
- JWT Decoder
Decode JSON Web Token header and payload
- JWT Generator
Sign JSON Web Tokens with HS256, HS384, or HS512 in your browser
- Basic Auth
Encode and decode HTTP Basic Authentication headers from username and password
- API Tester
Send HTTP requests to CORS-enabled APIs and inspect responses — runs in your browser
- cURL Converter
Convert cURL commands to JavaScript fetch, axios, Python requests, Node.js, or PowerShell
- HTTP Status
Searchable reference of every HTTP response code
- HTTP Headers
Searchable reference of common HTTP headers
- MIME Types
Searchable reference of common MIME content types
- Timezone
Convert datetimes between timezones
- Epoch Time
Convert between Unix epoch and ISO/local datetime
- Date Diff
Compute the difference between two dates
- Day of Week
Day of week, ISO week number, day-of-year, and leap-year info for any date
- JSON↔YAML
Convert between JSON and YAML in either direction
- CSV↔JSON
Parse CSV to JSON and serialize JSON to CSV
- Mock Data
Generate mock JSON arrays from a schema
Example Workflow
Roll out a scheduled backup job
- 1Sketch the backup cron schedule in plain English — Cron Builder
- 2Set the script file permissions in octal and symbolic notation — chmod Calculator
- 3Generate a strong, memorable service-account passphrase — Diceware
- 4Encrypt the config file with AES-GCM before committing — AES Crypt
- 5Verify the artifact checksum after the deploy pipeline runs — File Hash
- 6Confirm the next run window looks correct across all regions — Timezone