免费浏览器实用程序与商务工具

纯浏览器运行的 PDF 工具箱。合并多个 PDF、增删/排序/旋转页面、添加文字、签名与水印，无需上传到云端。

专为自由职业者、零售商和代理机构打造的发票与报价单制作工具。工时统计、收款二维码与矢量 PDF 下载。

免费便捷的浏览器图片编辑工具。快速裁剪、缩放尺寸、旋转、翻转并添加水印，零服务器上传，保护图片隐私。

Compress photos to exact target sizes (<50KB, <100KB, <200KB) for government/job portals and strip private GPS/camera metadata with zero server upload.

隐私安全的简历生成器，采用通过 ATS 筛选的模板设计，支持实时 ATS 得分检测、职位关键词匹配与 PDF 导出。

制作适用于链接、Wi-Fi、名片、支付的高分辨率二维码，支持自定义渐变色、点阵图案、内嵌 Logo 与矢量 SVG 导出。

高精度实时网络测速。精准测试下载速率、上传速率、Ping 延迟、抖动以及网络运营商详情，无干扰广告。

强大且私密的 JSON 格式化与语法检测工具。快速美化杂乱 JSON 代码，多视图切换，纯本地运行。

交互式拖拽式 JSON 构建工具。可视化创建复杂的对象、数组与键值对，实时双向代码同步，无需上传服务器。

Cryptographically secure password generator, human-friendly multi-word passphrases, and PIN maker with live Shannon entropy & brute-force crack time scoring.

适合中小企业、自由职业者与初创团队的专业工资单生成器。自动计算基本薪资、津贴、扣除额与个税，支持矢量 PDF 导出。

免费在线 NDA 保密协议与自由职业劳务合同生成器。支持双方法工签名与矢量 PDF 快速导出。

Calculate how extra monthly and yearly prepayments cut years off your home or car mortgage and save thousands in interest with interactive amortization tables.

交互式复利与定投增长计算器。支持定期追加投资、复利周期设定、通货膨胀抗跌测算、交互式趋势图表与还款明细表。

面向电商与零售定价的财务分析工具。实时计算毛利率 %、加价率 %、净利润以及每月保本销售量。

适用于零售、供应链与批发商的采购订单和送货凭证生成器。商品 SKU 清单、物流车辆信息与 PDF 导出。

Professional business expense report and reimbursement claim sheet. Itemize travel, meals, mileage, and tax with digital signature approval and PDF/CSV export.

Calculate your true billable hourly and daily rate factoring in self-employment taxes, business overhead, billable hours ratio, and vacation days.

Executive project proposal and Scope of Work (SOW) maker for agencies and freelancers. Milestones, deliverable tables, payment schedules, and PDF signatures.

Create official Employment Offer Letters and Work Experience / Relieving Certificates on corporate letterhead with digital signatures and PDF export.

结构化会议记录与议题管理工具。高效记录参会人员、核心决议与待办事项，支持导出 PDF 与 Markdown。

Draw smooth transparent e-signatures with automatic whitespace crop, and generate official circular corporate seal stamps with SVG vector export.

Visual side-by-side text & code diff comparison, case converter (camelCase, snake_case, Title Case), whitespace cleaner, and live reading time analytics.

100% offline, privacy-first JWT token debugger, expiration tracker, Base64 encoder/decoder, and SHA-256 / SHA-512 cryptographic hash calculator.

生成 Code 128、EAN-13、UPC-A 商品条码和自定义二维码标签。支持 CSV 批量导入并打印 A4 标签纸。

Multi-city 24-hour visual timezone comparison matrix. Detect mutual 9-to-5 working hour overlaps across remote teams and generate 1-click calendar invites.

Generate trackable marketing campaign URLs for Google Analytics 4 (GA4) and Meta with channel presets, bulk batch tagging, and instant QR codes.

Simulate and validate how your link cards render across LinkedIn, Twitter/X, Facebook, Slack, and WhatsApp with live HTML meta tag generation.

Create custom Android app icons and full Adaptive Icon asset packages. Design vector icons, preview parallax & masks (Circle, Squircle, Teardrop), and export complete mipmap densities (mdpi to xxxhdpi) + 512px Play Store icons in one click.

Design pixel-perfect iOS app icons with Apple HIG superellipse curvature and gold ratio grid guides. Generate complete Xcode AppIcon.appiconset with valid Contents.json, 1024px App Store marketing icon, and iOS 18 Light/Dark/Tinted modes.

Create high-converting App Store & Google Play marketing screenshots. Upload app screens, wrap in realistic iPhone 16 Pro and Pixel 9 Pro device frames, add 3D gradients, marketing titles, ratings badges, and batch export.

Design, preview, and download a 100% self-contained single-file HTML personal profile or link-in-bio website. Host for free on GitHub Pages, Cloudflare Pages, Vercel, or Netlify.

Craft high-performing prompts for ChatGPT, Claude, Gemini, DeepSeek, and Midjourney/Flux. RTF, Few-Shot, and Chain-of-Thought frameworks with 1-click export.

Convert plain English descriptions into verified Regular Expressions, SQL queries, Cron schedules, and Excel formulas with live interactive test visualizers.

Calculate exact token counts with visual heatmaps and compare estimated prompt & completion costs across GPT-4o, Claude 3.5, Gemini 1.5, DeepSeek, and LLaMA.

100% private in-browser text summarizer and readability analyzer. Extractive TextRank summaries, Flesch-Kincaid scoring, reading time, and sentiment indicators.

Turn blunt, frustrated, or messy thoughts into polite, professional, and diplomatic emails with custom tone, audience controls, and live token usage tracking.

Benchmark top AI models side-by-side with your free Gemini key. Compare response quality, latency, and tokens/sec in-browser.

Chat with contracts, research papers, and notes 100% in-browser. Zero server document uploads with direct citation highlights.

Explain complex algorithms, generate full unit test suites, optimize performance, and audit code for security bugs in-browser.

Convert plain English into optimized SQL queries with schema awareness and performance index recommendations across 5+ dialects.

Turn rough ideas into high-converting viral X threads, LinkedIn authority posts, newsletter blurbs, and SEO meta tags with zero subscriptions.

Calculate safe bunk quotas and recovery class requirements for university 75%, 80%, or custom attendance rules. Subject-wise tracker with local storage.

Calculate semester SGPA, cumulative CGPA, and forecast required grades to graduate with honors. Supports 4.0 US Scale, 10.0 Scale, and percentages.

Instant academic citation generator for websites, books, journals, and videos in APA 7th, MLA 9th, Chicago, Harvard, and IEEE styles with BibTeX export.

Real-time essay word counter, standard double-spaced page estimator, oral speech presentation timer, and Flesch-Kincaid readability scoring.

Click-to-insert visual math equation builder and LaTeX editor. Export high-resolution PNG images, SVG vectors, MathML, and LaTeX code for Word & Docs.

Track multi-subject finals countdowns, automatically calculate daily chapter study quotas, and generate printable A4 revision schedules.

Customizable 25/5 and 50/10 study timer with task checklists and 100% offline Web Audio synthesized ambient soundscapes (Rain, 40Hz Waves, Ocean).

College living cost and pocket money planner. Calculate monthly rent, meal plans, textbooks, and find your safe daily spending allowance.

Send WhatsApp messages to any number worldwide without saving to contacts, plus split long texts and stories into clean, numbered WhatsApp status updates with 1-click copy.

Generate 1-click social share links, WhatsApp status updates, and deep-link intent URLs for X (Twitter), LinkedIn, Telegram, Reddit, and Facebook with automatic UTM campaign tagging.

Design aesthetic 9:16 vertical cards for WhatsApp Status, Instagram Stories, Snapchat, and Facebook Stories with glassmorphic cards, gradient meshes, custom stickers, and HD PNG export.

Create pixel-perfect fake tweets, Threads posts, and LinkedIn cards with verified badges, custom engagement numbers (likes, views), media uploads, and dark/light modes.

Turn quotes, thoughts, code snippets, and poetry into aesthetic visual status cards for WhatsApp Status, Instagram Stories, and LinkedIn with custom gradients and glassmorphism.

Simulate and test YouTube video thumbnails and titles across Desktop, Mobile Dark/Light feeds, Sidebar suggestions, and A/B comparison tests before publishing.

Create high-converting multi-slide swipeable carousels for Instagram and LinkedIn with automatic multi-page PDF generation ready for LinkedIn document posts.

Create customizable Link in Bio micro-websites for Instagram, TikTok, and Twitter, and export as a self-contained standalone HTML website you own completely.

Create cross-client compatible HTML email signatures for Gmail, Outlook, and Apple Mail with custom photos, social badges, and 1-click rich text copy.

Freehand vector sketching studio. Draw smooth strokes with Bezier curve fitting, convert doodles to clean SVG paths, and export transparent PNGs.

Hand-drawn sketchy whiteboard for architectural wireframes, decision flowcharts, rough diagrams, and sticky note brain-dumps with SVG and PNG export.

Create personalized greeting cards and invitations for birthdays, weddings, holidays, and thank-you notes with handwritten signature layer and PDF export.

Generate high-converting hooks, add invisible spaces for clean line breaks on Instagram and Threads, and convert text to Unicode bold/italic styles with live character limit meters.

Create beautiful event countdowns and daily habit streak milestone cards (100 Days of Code, Fitness, Habit tracking) for WhatsApp Status and Instagram Stories.

Fair random giveaway and contest winner picker with duplicate filtering, weighted entries, celebratory confetti, and verified downloadable certificates.

Multi-criteria weighted scoring decision matrix and strategic SWOT analysis tool. Evaluate vendor options and business strategies with PDF export.

Interactive visual Gantt chart and sprint roadmap planner. Track task progress, milestone dependencies, and project dates with SVG/PNG/CSV export.