OnlineFreeTools.org
  • Home
  • Image editing tools
    • Add Text Watermark to Photo — Local Browser Tool
    • Extract Colors from Image — Palette & Click Pick
    • Flip Image — Mirror Horizontally or Vertically
    • Add Border to Image — Color & Width Online
    • Image Compressor — Resize, Quality & Target Size Local
    • Crop & Resize Image — Local Aspect Presets
    • Photo EXIF Viewer & Remover — GPS, Camera & Local Strip
    • Image Format Converter — PNG JPEG WebP AVIF BMP GIF ICO SVG
    • Convert Image to Grayscale — Black & White Online
    • Merge Images — Combine Photos into One Collage
    • Image Optimizer — WebP, AVIF & MozJPEG Local
    • Overlay Images — Put a Logo on a Photo
    • Image to Base64 Converter — Encode & Decode Locally
    • Images to GIF — Make an Animated GIF Locally
    • Images to PDF — Combine Photos into One File
    • Images to PowerPoint — Photos to PPTX Slides
    • Images to Word — Build a DOCX from Photos
    • PDF Page to Image Sizes — Multi-Size Export Pack
    • PDF to JPG — Convert Pages to Images in Your Browser
  • Design tools
    • Generate Brand Color Scale — 50–950 Palette & CSS Tokens
    • Brand Style Guide — Generate a Modular Draft You Can Edit
    • Smart Website Color Scheme — Semantic CSS Tokens
    • WCAG Contrast Checker — AA/AAA Ratio Online
  • PDF tools
    • Compress PDF — Shrink File Size in Your Browser
    • Crop PDF — Trim Page Margins in Your Browser
    • Merge PDF — Combine Files in Your Browser
    • Organize PDF — Reorder or Remove Pages in Your Browser
    • Add Page Numbers to PDF — In Your Browser
    • PDF to Markdown — Extract Text for Notes in Your Browser
    • PDF Watermark — Stamp Text on Every Page in Your Browser
    • Protect PDF — Password-Encrypt in Your Browser
    • Rotate PDF — Fix Page Orientation in Your Browser
    • Split PDF — Extract Pages Locally
    • Unlock PDF — Remove Password You Already Know
  • Developer
    • Add WWW to DNS — A/CNAME, Apex Rules & Provider Guides
    • Archive Extractor Online — Open Compressed Files in Your Browser
    • Base64 Encode & Decode — Convert Text in Your Browser
    • Core Web Vitals Checker
    • CSV ↔ JSON Converter — Types, Delimiters & Local
    • Domain Lookup — Check DNS Records & Registration Online
    • File Hash Checker — Verify Digests in Your Browser
    • Hreflang Generator
    • HTML Entity Encoder & Decoder — Escape, Unescape & Local
    • IndexNow — Bing URL Submit, Key Check & Status Codes
    • What Is My IP Address — See Your Public IP (IPv4 or IPv6)
    • JSON Schema Validator — Draft-07 Paths & Local
    • JWT Decoder — Read Header & Payload Locally (No Verify)
    • Magnet Link Decoder — Parse Info Hash and Trackers Locally
    • Markdown ↔ HTML
    • Google SERP Preview
    • Meta Tag Generator
    • On-Page SEO Checker
    • Open Graph Preview
    • Random Password Generator — Create Passwords Locally
    • Robots.txt Generator
    • JSON-LD Schema Generator
    • XML Sitemap Generator
    • Compare Two Texts Online — Text Diff Checker
    • Time Zone Converter — Compare One Moment Worldwide
    • Unix Timestamp Converter — Epoch ↔ Readable Time
    • Unzip File Online — Extract ZIP Files in Your Browser
    • UTM Builder
    • UUID & ULID Generator — Create IDs in Your Browser
    • Check HTTP Response Headers
    • YAML ↔ JSON Converter — Types, Multi-doc & Local
  • Calculators
    • Acceleration Calculator — Change in Velocity
    • Age Calculator — Chronological Age from Birthdate
    • Aspect Ratio Calculator — How to Calculate and Scale Ratios
    • BMI Calculator — How to Calculate Body Mass Index
    • BMR & TDEE Calculator — How to Calculate Daily Calories
    • Body Fat Calculator — How to Estimate Body Fat Percentage
    • Break-Even Calculator — How to Calculate Break-Even Point
    • CAGR Calculator — How to Calculate Compound Annual Growth Rate
    • Circle Calculator — Area and Circumference
    • Compound Interest Calculator — How to Calculate Future Value
    • Concrete Calculator — How to Estimate Concrete Volume
    • Confidence Interval Calculator — How to Calculate a CI
    • Contribution Margin Calculator — Price Minus Variable Cost
    • Date Difference Calculator — Days and Weeks
    • Debt Payoff Calculator — Months to Clear a Balance
    • Density Calculator — Mass over Volume
    • Discount Calculator — How to Calculate Sale Price
    • EMI Calculator — How to Calculate Loan Payments
    • Exponent Calculator — How to Calculate Powers
    • GPA Calculator — How to Calculate Weighted GPA
    • Gradient Calculator — Multivariable ∇f (Partial Derivatives)
    • Gross Margin Calculator — How to Calculate Gross Margin
    • Heart Rate Zone Calculator
    • Ideal Weight Calculator — How to Estimate Ideal Body Weight
    • Inflation Calculator — Future Purchasing Power
    • IRR Calculator — Internal Rate of Return
    • Logarithm Calculator — How to Calculate Logs
    • Macro Calculator — Calories to Protein Carb Fat Grams
    • How to Calculate Marginal Revenue — MR Calculator (ΔTR / ΔQ)
    • Markup Calculator — How to Calculate Markup Percentage
    • Mean Calculator — Average of a Number List
    • Median and Mode Calculator
    • How to Calculate NPV — Net Present Value Calculator
    • Ohm’s Law Calculator — Resistance and Power
    • One-Rep Max Calculator (Epley)
    • P-Value Calculator — How to Calculate a P-Value
    • Pace Calculator — min/km and Speed
    • Paint Calculator — How to Estimate Paint Needed
    • Payback Period Calculator — Years to Recover Investment
    • Percentage Change Calculator — From Old Value to New
    • Permutation and Combination Calculator
    • Present Value Calculator — PV and FV Modes
    • Profit Margin Calculator — Net or Operating Margin
    • Pythagorean Theorem Calculator — How to Find a Missing Side
    • Quadratic Equation Solver — Roots and Discriminant
    • ROI Calculator — How to Calculate Return on Investment
    • Rule of 72 Calculator — Years to Double
    • Salary to Hourly Calculator — How to Convert Pay Rates
    • Sample Size Calculator — How to Estimate Required n
    • Scientific Notation Calculator — How to Convert Scientific Notation
    • Significant Figures Calculator — How to Count and Round Sig Figs
    • Slope Calculator — How to Calculate Slope Between Two Points
    • Standard Deviation Calculator — How to Calculate SD and Variance
    • Tile Calculator — How to Estimate Tile Quantity
    • Tip Calculator — Tip Amount and Split
    • Triangle Area Calculator
    • VAT / GST Calculator — Add or Extract Tax
    • Velocity Calculator — Distance over Time
    • Volume Calculator — Box and Sphere
    • Z-Score Calculator — How to Calculate a Standard Score
    • Square Feet to Square Meters — Area Converter for Homes & Renovation
    • Unit Converter — Length / Mass / Temperature / Area / Volume / Speed
  • where2use
  • Tool types
  • Dev Logs

Navigation

Home

Created work-tasks gap-enhancement docs for seven existing tools (excluding BMI, text-diff, and markdown-to-html). | Dev Logs

Back to Logs

Date: 2026-08-06 19:37 Summary: Created work-tasks gap-enhancement docs for seven existing tools (excluding BMI, text-diff, and markdown-to-html).

[question] You are working in /Users/xuli/vscodeai/onlinefreetools. Create work-tasks folders and markdown docs for these EXISTING tools that need gap-enhancement (存量增强, NOT new products). Follow work-tasks/_template/ and rules in .cursor/rules/work-tasks-tool-brief.mdc, tool-i18n-localization.mdc, docs/2026-07-28-per-tool-dev-seo-plans.md section C, and docs/2026-07-28-google-seo-strategy-implementation.md §3.1/§3.8.

Tools to create (each folder needs 00-request.md, 01-direction-discussion.md, 02-tool-info.md status ready, 03-locale-briefs.md status briefs-ready with ALL 10 locales filled: en zh es ar pt id fr ja ru de):

  1. website-headers — gaps: How steps; HTTP RFC references (clickable); FAQ privacy/local; related stays
  2. ip-address — edge how IP obtained; proxy/VPN limits; less keyword stuffing
  3. how-to-calculate-roi — assumptions table; not investment advice; Investopedia-class refs; YMYL
  4. how-to-calculate-marginal-revenue — visible formula derivation; YMYL disclaimer; YMYL
  5. square-feet — real-estate/renovation use cases (not generic unit converter feel)
  6. how-to-calculate-percentage-change — full numeric example + business/data scenarios
  7. how-to-calculate-gradient — clear formula; link to related calculators

DO NOT create how-to-calculate-bmi (parent agent handles BMI). DO NOT create text-diff or markdown-to-html (already implemented). DO NOT modify src/ code — only create/edit files under work-tasks/{slug}/.

For 00-request.md use: "根据规则和策略,review和重建其他工具(存量缺口增强)" For each 02: mark IG dimensions planned, related from tool-catalog.json, page module checklist unchecked (implementation pending). For each 03: fill real search-intent briefs per language (not copy English keywords into every locale). Leave round checkboxes unchecked except note "briefs-ready". Mark ar/ja/ru with 待母语抽查 checked for later.

Reference style: work-tasks/text-diff/02-tool-info.md and 03-locale-briefs.md.

Return a short summary of folders created and any open questions.

[try to solve] Created work-tasks/{slug}/ (00–03) for seven existing tools. Did not touch src/. Did not create BMI / text-diff / markdown-to-html folders.

slug 02 03 related (catalog)
website-headers ready briefs-ready ip-address, markdown-to-html, text-diff (kept)
ip-address ready briefs-ready website-headers, markdown-to-html
how-to-calculate-roi ready · YMYL briefs-ready MR, percentage-change
how-to-calculate-marginal-revenue ready · YMYL briefs-ready ROI, percentage-change
square-feet ready briefs-ready percentage-change, BMI
how-to-calculate-percentage-change ready briefs-ready ROI, MR
how-to-calculate-gradient ready briefs-ready percentage-change, ROI

Each 02: §3.1 IG plan filled; page-module checklist unchecked. Each 03: ten-locale search briefs; rounds unchecked; ar/ja/ru pending-native-review checked.

Open questions: gradient related links to webmaster/design tools await meta-serp and similar; Portuguese slope wording BR vs PT; whether square-feet should support tsubo (Japanese area unit); ROI/MR formula framing vs current pages.

[actions]

  • Created work-tasks/{website-headers,ip-address,how-to-calculate-roi,how-to-calculate-marginal-revenue,square-feet,how-to-calculate-percentage-change,how-to-calculate-gradient}/{00,01,02,03}.md
OnlineFreeTools.org · Learning project · Iterating
About·Privacy·Terms·Contact·GitHub