YuanqiZhiKe Toolkit - Free Offline Tools, Verifiable by Design
Verifiable by design. Private by default. YuanqiZhiKe Toolkit is a collection of 800+
browser-based tools for everyday calculation, conversion and text work. Every tool runs entirely in your
browser: nothing is uploaded, nothing is tracked, and every result is deterministic - you can reproduce it and
check it. No registration, no hidden fees, no data collection.
For Teams: Verifiable, Private Computation
AI can produce a number. It cannot show your compliance team how that number was reached, and in most
regulated workflows it is not allowed to touch personal data at all. That gap is what we build for:
deterministic calculations that run on your own machine, with inputs, formulas and outputs you can audit line
by line.
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Data Masker - Redact emails, phone numbers, national IDs and card
numbers before a text goes anywhere near a third-party model. Runs locally; the original never leaves the
page.
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Amortization Schedule Generator - Full
repayment schedule with per-period interest, principal and balance, so the numbers can be checked one row at
a time.
Need this inside your own product or workflow? See our
custom development services, or contact us.
AI Tools
17 AI-assisted tools that run in your browser — writing, research, translation, detection and business
analysis. Same rule as everything else here: your text is processed in the page, not uploaded.
AI Business Intelligence
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Data Insight Writer - Paste metrics
and get ready-to-use narratives.
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Excel Formula Generator - Convert
plain-English requirements into precise Excel and Google Sheets formulas instantly.
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KPI Definition Generator -
Resolve inconsistent metric definitions by generating three standardized KPI variants (strict, standard,
broad) for any business metric.
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Report Summarizer - Paste any weekly,
monthly, or earnings report and instantly get a structured executive summary with TL;DR, key findings,
risks, and recommendations.
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SQL Query Generator - Translate plain
English requests into executable SQL queries instantly.
AI Career
AI Detection
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AI Content Detector - Paste any text and receive a
transparent probability score based on five measurable linguistic signals.
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Plagiarism Similarity Checker - Compare two texts
instantly to calculate overlap percentage using local n-gram analysis.
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Readability Score Calculator - Instantly analyze
writing clarity using three proven formulas: Flesch Reading Ease, Flesch-Kincaid Grade, and Gunning Fog.
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Tone Emotion Analyzer - Detects the emotional
undertone of customer emails, social posts, or drafts using a local sentiment lexicon.
AI Translation
AI Writing
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AI Text Rewriter - Rewrite sentences, paragraphs, or articles
in Standard, Fluency, or Creative modes.
See the full AI collection on the AI tools page.
Popular Tools
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Tip Calculator - Work out a tip, add tax, split the bill and
round the result, with regional presets and nothing sent off your device.
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QR Code Generator - Turn any text or URL into a scannable QR
code, with adjustable size and error-correction level, generated entirely offline.
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Data Masker - Strip emails, phone numbers, IDs and card numbers
out of a text before you share it, with the whole redaction done in the page.
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Amortization Schedule Generator - Build a full
repayment schedule you can check row by row: interest, principal and closing balance per period.
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Why Use YuanqiZhiKe Toolkit?
- Verifiable - Every result is deterministic, and can be reproduced and checked by hand
- 100% Free - No registration, no subscriptions, no hidden fees
- Private by Default - Nothing is uploaded; all computation happens inside your browser
- Works Offline - Use any tool even without internet
- Open Source - All tools are open-source and freely modifiable
- Multi-Language - Available in 6 languages
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