MasterTool
2,613 free calculators that run privately in your browser
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This is 1 of 154 launches in online calculation tools — see how it stacks up on momentum and crowding →
422 other launches read as similar to this one →
Details
- External ID
- 1273692
- Source
- PH
- Company
- —
- Product
- MasterTool
- Website domain
- producthunt.com
- Launched
- Oct. 9, 2026
- Cohort
- —
- Upvotes
- 1
- Upvotes percentile
- 0.33
- Tags
- Productivity, Developer Tools, Finance
Description
MasterTool is a library of 2,613 free online calculators and converters — seller fees for 23 platforms, mortgage and 2026 income-tax calculators, landscaping material estimators, unit converters, and more. Every calculation runs 100% client-side in your browser: no sign-up, no server receives your inputs. Every calculator can also be embedded into any blog or page with one iframe.
Enrichment
- Niche
- online calculation tools
- Vertical
- Horizontal
- Function
- Workflow automation
- Audience
- Prosumer
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- browser-based privacy-focused calculator suite
- Manually corrected
- False
Could you build this?
Yes A static directory of client-side JavaScript calculators and converters is a quintessential vibe coding project easily generated with LLMs.
Competitors
Other products that read as similar to this one — 422 launches clear the similarity bar, closest 8 shown.
Attention rank: #80 of 423 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 239 days after the earliest competitor.
- CalcProMaster — 1200+ Free Calculators · ph · 2026-09-22 · 1 upvotes · similarity 0.61
- Free Calculator · ph · 2026-10-07 · 1 upvotes · similarity 0.59
- OnlineToolHubs · ph · 2026-10-01 · 1 upvotes · similarity 0.59
- All Calculator Tools · ph · 2026-10-06 · 1 upvotes · similarity 0.54
- CalcBright · ph · 2026-10-13 · 1 upvotes · similarity 0.54
- PlayTools · ph · 2026-09-10 · 2 upvotes · similarity 0.54
- Calchorus · ph · 2026-10-11 · 1 upvotes · similarity 0.54
- CalclifyApp · ph · 2026-09-07 · 1 upvotes · similarity 0.53
Other launches for this product
- No other launches for this product.