Tools

Single-page utilities for devops, cloud, and networking work. Everything runs in your browser unless explicitly marked otherwise. No accounts, no rate limits, no ads. Currently shipping 22 live tools, with more on the way.

Networking3 live · 0 soon

CIDR calculator

Compute subnet ranges, host counts, masks, and reverse-DNS zones for IPv4 and IPv6 CIDR notation.

What's my IP

Detect your public IPv4 / IPv6 address as the server sees it.

DNS lookup

Query A, AAAA, MX, TXT, CNAME, NS records for a hostname.

Auth & tokens1 live · 0 soon

JWT decoder

Paste a JWT, see the decoded header and payload, verify expiry. Fully client-side, never leaves your browser.

Scheduling1 live · 0 soon

Cron visualizer

Decode a cron expression, see the next ten runs in your timezone, with field-by-field breakdown.

Encoding3 live · 0 soon

JSON ↔ YAML

Convert between JSON and YAML in either direction, with pretty-print and minify options.

Base64 encode / decode

Encode text to base64 or decode base64 back to text. Supports URL-safe variant.

URL encode / decode

Percent-encode and decode URLs, with support for whole URIs or just the query component.

Identifiers1 live · 0 soon

UUID generator

Generate UUID v4 (random) or v7 (time-ordered) identifiers, batched if you need many.

Time1 live · 0 soon

Unix timestamp converter

Convert between Unix timestamps (seconds or milliseconds) and ISO 8601 dates, in any timezone.

Data5 live · 0 soon

Regex tester & explainer

Test regular expressions against sample input with live match highlighting and group capture, a token-by-token explanation, and beginner lessons for each category.

SQL formatter

Pretty-print SQL queries for a chosen dialect (PostgreSQL, MySQL, ClickHouse, BigQuery).

Color contrast checker

Measure foreground / background contrast against WCAG AA and AAA thresholds.

JSON to types

Generate TypeScript, Go, Rust, or Python type definitions from an example JSON document.

Markdown preview

Live GitHub-Flavored Markdown preview with side-by-side editor.

Cloud2 live · 0 soon

AWS ARN parser

Split an AWS ARN into partition, service, region, account, and resource components.

kubectl secret helper

Encode and decode Kubernetes Secret stringData values from base64.

Web & HTTP3 live · 0 soon

HTTP header inspector

Fetch a URL and inspect the response headers, status code, and redirect chain.

SSL / TLS certificate inspector

Look up the TLS certificate for a hostname — subject, issuer, expiry, SAN list, fingerprint.

curl converter

Convert a curl command to a fetch, Python requests, Go net/http, or Bun snippet.

Compensation2 live · 0 soon

Estonian salary calculator

Convert between gross, net, and employer budget using Estonia's 2026 tax rules. Hourly, monthly, and yearly views all at once. English UI.

Contractor vs employee rate (Estonia)

Convert between an employee take-home (B2C) and the contractor invoice (B2B) needed to match it after vacation, sick days, and benefits. Three OÜ tax models compared side by side.