Free Web Tools

Quick, no-signup utilities backed by the HeffTools DevOps API.

Need higher limits? View API on RapidAPI

UUID Generator

Generate one or more UUIDv4 values for testing, database keys, or API tokens.

GET /api/v1/uuid/generate Instant · No input required

Password Generator

Generate secure random passwords with configurable length and character sets.

GET /api/v1/password/generate Configurable length & charset

Regex Tester

Pattern matching

Test regular expressions against sample text with support for common flags.

POST /api/v1/regex/test Matches & capture groups

Base64 Encoder / Decoder

Encode & decode text

Convert text to and from Base64. Supports auto-detect mode for instant encoding or decoding.

POST /api/v1/base64 Encode · Decode · Auto Detect

URL Encode / Decode

Percent-encode or decode URL strings for query parameters, redirects, and logs.

POST /api/v1/url/encode POST /api/v1/url/decode Text ↔ encoded

JWT Decoder

Inspect JWT payloads

Decode JSON Web Tokens without verifying signatures. View header, payload, and claims instantly for debugging and development.

Format & Convert

JSON / YAML / CSV

Convert between JSON, YAML, and CSV formats for configs, payloads, and exports.

POST /api/v1/convert json_to_yaml · yaml_to_json · json_to_csv

Cron Next Runs

Scheduling helper

Visualize the next few execution times for any 5-part cron expression in UTC.

POST /api/v1/cron/next-runs Cron debugging

Subnet Calculator

Compute network, broadcast, and usable host range for CIDR subnets.

POST /api/v1/subnet/calc Network planning

These tools are backed by the same APIs available on RapidAPI. For higher rate limits, API keys, and team integrations, check out the HeffTools DevOps Utilities API on RapidAPI .