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Stax Tools
Free online tools for developers, finance, AI writing, PDFs
Hey Product Hunt 👋
I built Stax because I got tired of the same broken pattern: open a free online tool → hit a paywall after 3 uses → forced signup → "your file size exceeds the free limit" → email confirmation → upgrade prompt.
Just to format some JSON. Or compress a PDF. Or calculate an EMI.
Stax is 235 free tools across 15 categories — developer, finance, PDF, image, health, civil engineering, electronics, and more. Three rules I refused to break:
No login. Ever. Not even for "premium" features. There are none.
No tracking. Your files never leave your browser. Open DevTools and check the Network tab — nothing uploads.
No limits. No file size caps, no usage quotas, no daily limits.
Some tools I'm most proud of:
JSON Formatter (handles 50MB+ files locally)
PDF Compressor (truly browser-based, no server upload)
EMI / SIP / GST Calculators (India-focused, but useful globally)
Civil Engineering calculators (rare to find free)
I'd love to hear: which free online tool has annoyed you most with logins/paywalls? I'll try to add it to Stax this month.
– Harshil
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About Stax Tools on Product Hunt
“Free online tools for developers, finance, AI writing, PDFs”
Stax Tools was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #47 on the daily leaderboard. Free online tools for developers, finance, AI writing, PDFs, and more. 100% browser-based — no login, no data stored, no limits.
Stax Tools was featured in Health & Fitness (82.6k followers), Fintech (46.9k followers) and Developer Tools (512.4k followers) on Product Hunt. Together, these topics include over 110.4k products, making this a competitive space to launch in.
Who hunted Stax Tools?
Stax Tools was hunted by Harshil Shah. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Stax Tools stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Harshil Shah