30 SaaS Ideas You Can Build Over a Weekend

Check all DNS records for any domain instantly. API + web UI.

Upload image → extract brand colors with HEX codes.

Test regex patterns with AI explanation of each part.

Format, validate and convert JSON via API.

Simple REST API returning location data from IP address.

Highlight differences between two text blocks.

Visual interface to build and explain cron schedules.

Simple tool with API endpoint for bulk encoding.

Enter URL → generate XML sitemap in seconds.

Convert markdown files to styled HTML pages.

Generate social preview images from any URL automatically.

Track SSL expiry dates and get alerts before certificates expire.

Generate realistic placeholder text by industry — legal, medical, tech.

Shorten URLs with click tracking, geo data, and QR codes.

Upload logo → generate all favicon sizes and manifest.json.

Mock any HTTP status code for testing error handling.

API that scores password strength and suggests improvements.

Verify email addresses are real, deliverable, and not disposable.

Parse user agent strings into device, OS, and browser data.

Receive, inspect, and debug webhooks from any service.

Check any URL for SEO meta tags, Open Graph, and Twitter cards.

Generate MD5, SHA-1, SHA-256 hashes with API access.

Check WCAG accessibility compliance for color combinations.

Convert between timezones with DST awareness via API.

API to generate professional PDF invoices from JSON data.

Capture full-page screenshots of any URL via API.

API to check if an email is from a temporary/disposable provider.

Build beautiful GitHub profile READMEs with a visual editor.

Decode, verify, and debug JSON Web Tokens in the browser.

Generate GDPR/CCPA-compliant privacy policies for your app.