Free Tools for SaaS Founders
A curated suite of 24 free, fast, and privacy-first tools designed to help indie builders launch, track revenue, and grow search traffic.
Webhook Payload Inspector
Inspect, validate, format, and search JSON webhook payloads locally with nested object tree view and data type detection.
API Response Diff Checker
Compare two JSON API responses recursively to detect added, removed, modified fields, and type discrepancies side-by-side.
Changelog Generator
Create structured software release notes in Keep a Changelog Markdown and HTML with added, improved, and fixed sections.
Open Source License Compatibility Checker
Check compatibility between 11 major open-source licenses (MIT, Apache, GPL, MPL, BSD) with legal requirements and copyleft rules.
Favicon Preview & Validator
Preview and validate favicons across browser tabs, Google mobile snippets, and bookmark bars with HTML link tags.
MRR Growth Calculator
Calculate ending Monthly Recurring Revenue (MRR), ARR, Net New MRR, and revenue growth percentage.
SaaS Churn Rate Calculator
Measure customer churn, revenue churn, retention rate, and project annual revenue loss.
SaaS Pricing & Profit Calculator
Model your subscription price per user based on operating costs, merchant fees, and desired profit margins.
Churn Reason Analyzer
Analyze customer cancellation surveys and feedback from uploaded CSVs with categorization, percentage distribution, and report exports.
SaaS Pricing Comparison Builder
Build side-by-side competitor pricing matrices with plan tiers, feature tables, cheapest plan highlights, and CSV/PDF export.
Affiliate Commission Calculator
Calculate affiliate earnings and partner program payouts across one-time bounties, recurring lifetime rev-share, and referral targets.
Free Trial Conversion Calculator
Measure trial-to-paid conversion rates, compare against SaaS opt-in vs opt-out benchmarks, and simulate revenue growth.
SaaS Break-Even Calculator
Calculate how many paying customers and what monthly revenue you need to cover fixed hosting, tools, and payment fees.
SaaS Launch Checklist
Interactive step-by-step 19-point launch checklist across Pre-Launch, Launch Day, and Post-Launch.
Product Hunt Tagline Counter
Test your product punchline against Product Hunt’s official 60-character limit with a live launch preview.
SaaS Onboarding Flow Planner
Map out complete 7-stage user onboarding journeys from signup to aha-moment and activation with time-to-value estimates.
Feature Request Prioritizer
Prioritize product roadmap features using a transparent weighted scoring model factoring demand, impact, effort, and confidence.
Domain Rating Checker
Check the official Ahrefs Domain Rating (DR) of any website on a 0-100 logarithmic scale.
UTM Link Builder
Generate custom campaign tracking URLs with source, medium, campaign, and content tags.
Meta Tag Generator
Create complete SEO and Social Open Graph meta tags with live Google snippet preview.
Robots.txt Generator
Build a valid, search-engine-friendly robots.txt file with custom allow, disallow, and AI scraper rules.
URL Slug Generator
Transform titles, headlines, and strings into clean, SEO-friendly lowercase URL slugs.
Open Graph Social Preview
Preview how your website and blog links look when shared on X/Twitter, LinkedIn, and Facebook.
JSON-LD Schema Generator
Generate valid Schema.org structured data for SoftwareApplication, Organization, Product, FAQ, and more.
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