Tools we ship — yours to use, free

Test, explain, replace.

A regex playground that highlights matches inline, breaks out capture groups, and previews replacements in real time. JavaScript flavour, every flag supported.

Cron expressions, decoded.

Type a cron expression, get a plain-English explanation and the next five run times. No accounts, no friction — just answers for the syntax developers keep googling.

JSON in, types out.

Paste a JSON payload, get TypeScript interfaces inferred instantly — including nullability, arrays, and nested shapes. Saves the five-minute typing tax on every new API integration.

Decode, inspect, verify.

Paste a JSON Web Token, see the header and payload, check expiry against now, and verify the signature for HS256 with a key. Runs entirely in your browser.

Paste curl, ship code.

Drop a curl command from any API doc, get clean JavaScript fetch() or Python requests code. Parses methods, headers, JSON bodies, query strings, and basic auth.

Format, validate, minify.

Paste JSON and get it pretty-printed instantly — 2 spaces, 4 spaces, tabs, or minified. Invalid input is pinpointed to the exact line and column. Optional key sorting for clean diffs.

Epoch time, decoded both ways.

A live Unix clock plus a converter that auto-detects seconds, milliseconds, or any date string — and gives you local time, UTC, ISO 8601, and human-readable relative time.

Social cards without the design tax.

A focused editor for Open Graph and Twitter card images. Pick a template, set your copy, export a 1200×630 PNG. Stop screenshotting Figma frames for every link preview.

From one colour to a usable scale.

Type a hex value, get a full Tailwind-style 50–950 ramp plus WCAG contrast scores against black and white. Copy the config and ship.

See the unfurl before you ship.

Edit your title, description, and OG image and watch live Google, Slack, Discord, and X previews update as you type. Paste existing HTML to import your current tags, then copy a clean block back.

Unit economics in four inputs.

Enter ARPA, margin, churn, and CAC to get LTV, LTV:CAC, and CAC payback — each colour-coded against the benchmarks founders live by. Plus a twelve-month MRR and ARR projection.

Campaign links that report cleanly.

Build tagged tracking URLs with live preview, quick-fill presets for the common sources and mediums, and forced lowercase so your analytics don't split one campaign into five.

Status pages for teams that ship.

Cron-driven uptime checks and a clean public status page — without the enterprise pricing or the bloat. In active development.

Inspect, replay, debug webhooks.

Generate a capture URL, watch incoming payloads in real time, replay them to your local environment. The fastest way to debug a webhook integration. In active development.