We Built 27 Free, Zero-Auth Web Calculators for Developers & Founders
Most modern online calculators are bloated with intrusive banner ads, demand an email address, or send your sensitive financial numbers to remote cloud databases.
We decided to build a fleet of 27 institutional-grade web utilities that follow a strict architecture:
- 100% Free & Zero-Auth: No accounts, no paywalls, no credit cards.
- Client-Side Confidential: Everything runs locally in pure JavaScript and WebAssembly on your machine. Zero data is ever logged to a remote server.
- Instant Speed: Hosted globally on Cloudflare edge infrastructure.
🌐 The Central Hub
You can explore the full catalog with live search across all 27 tools here:
👉 ParthaFinco Tools Directory Hub
🛠️ Featured Developer & AI Tools:
- SQLite WASM Storage Quota Estimator: Estimate OPFS (Origin Private File System) limits, browser quotas, and WAL overhead across Chrome, Safari, and Firefox.
- LLM KV Cache Memory Size Calculator: Size GPU VRAM for Llama 3, DeepSeek, and Mistral with GQA memory modeling.
- Prompt Cache Savings ROI Calculator: Model latency cuts and cloud API discounts for Claude 3.5 Sonnet, GPT-4o, and DeepSeek.
- Tokens to Words Calculator: Convert AI tokens to words and reading time with a live text tokenizer.
- Supabase vs Neon Compute Cost Calculator: Compare monthly cloud Postgres billing between flat instances and scale-to-zero serverless CUs.
- Bluesky Custom Domain DNS Generator: Generate exact AT Protocol DID DNS TXT records.
🏛️ Corporate Tax & Legal Models:
- Section 1202 QSBS Exclusion Calculator: Model IRS § 1202 capital gains exclusions ($10M cap vs 10x basis rule).
- S-Corp Tax Savings Calculator: Compare LLC vs S-Corp tax liability and 15.3% self-employment tax savings.
- De Minimis Safe Harbor Expense Calculator: Audit small business equipment expensing against IRS § 1.263 rules.
- FinCEN BOI Exemption Checker: Verify 23 Corporate Transparency Act exemptions.
All tools are completely free to use. Feedback and formula suggestions are always welcome!