Free SaaS Tools & Calculators
Lightweight calculators and pickers for SaaS buyers, Amazon sellers, and data teams. No sign-up, no email gate — every tool runs in your browser and the numbers update as you type.
- New
Free Credits Maximizer
Six questions → every startup credit you qualify for, with the total pile.
Open tool → - New
Runway Extender
Your burn + your stack → cheaper equal-or-better swaps → months of runway gained.
Open tool → - New
Stack Roast
Keep, negotiate, or switch — verdicts from real scorecards, with receipts.
Open tool → - New
Google Preferred Source Button
Generate a one-tap button so readers make your site a Google preferred source.
Open tool → - Interactive
SaaS Stack Builder
Pick tools, see your monthly total, and save a shareable stack.
Open tool → - Calculator
Amazon FBA Calculator
Margin, net profit, and break-even ACoS in real time.
Open tool → - Quiz
Deal Finder Quiz
Answer 4 questions, get the top deals for your situation.
Open tool → - Recommender
Scraper Chooser
Pick between Apify, Bright Data, and Oxylabs in 3 questions.
Open tool →
Why free tools on a deal site?
Most calculators and pickers are built to generate leads — they show you a result and then ask for your email before they'll let you do anything with it. Every tool here runs entirely in your browser. No sign-up. No email gate. Numbers update as you type.
Pick tools from any category, watch the monthly total update in real time, and share the finished stack via a short URL. Useful before a renewal or team review.
Enter COGS, Amazon fees, and ad spend to see true margin, net profit, and the break-even ACoS for any ASIN. Works for any fulfillment model.
Short decision-tree quizzes that end with a ranked shortlist. Better than reading a 3,000-word comparison when you already know your constraints.
Done picking? Browse every verified offer on the SaaS deals page, or jump straight to popular categories like AI writing, web scrapers, and Amazon seller tools.
More free from SaaSTweaks
Generate a one-tap button so readers make your site a Google preferred source (Top Stories + AI answers).
Guess the Price (daily), Higher or Lower, and Runway: The Game — all on real pricing data.
Live boards of money founders leave on the table — credits, locked savings, annual spreads.
Embed your independent 0–100 Score on your own site — free SVG, links back to your review.