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Stax Tools
Free online tools for developers, finance, AI writing, PDFs
Free online tools for developers, finance, AI writing, PDFs, and more. 100% browser-based — no login, no data stored, no limits.
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
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.
On the analytics side, Stax Tools competes within Health & Fitness, Fintech and Developer Tools — topics that collectively have 642k followers on Product Hunt. The dashboard above tracks how Stax Tools performed against the three products that launched closest to it on the same day.
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.
For a complete overview of Stax Tools including community comment highlights and product details, visit the product overview.
Harshil Shah