Best PDF24 Alternative: WhiskFile
PDF24 提供非常慷慨的免费层级，几乎不限使用次数并提供桌面应用程序，但其用户界面陈旧且没有任何 AI 功能。WhiskFile 则以牺牲部分免费使用量为代价，换取了显著提升的用户体验和 AI 功能。
最后测试时间：July 2026 · 基于实际测试。
免费方案对比
| 功能 | WhiskFile | PDF24 |
|---|---|---|
| Daily task limit | 7 tasks per day | Near-unlimited (ad-supported) |
| Max file size | 50 MB | No stated limit (varies by tool) |
| Advertisements | None | Ads on free usage |
| Account required | No | No |
定价对比
| 方案 | WhiskFile | PDF24 |
|---|---|---|
| Free tier | Free — 7 tasks/day, 50 MB | Free — very generous, near-unlimited |
| Paid | $4.99/month Pro | Free (no paid plan — revenue from ads) |
Pricing checked on: September 24, 2026. PDF24 pricing page
功能对比
| 功能 | WhiskFile | PDF24 |
|---|---|---|
| 简洁现代的 UI | ||
| 无需注册账号 | ||
| AI PDF 总结 | Pro+ | |
| AI PDF 聊天 | Pro+ | |
| REST API | Pro+ (38 endpoints) | |
| 按书签拆分 PDF | ||
| 贝茨编号 (Bates numbering) | ||
| 桌面应用程序 | ||
| 结构化数据 / Schema 标记 | ||
| 优先处理 | Pro+ | |
| 工具总数 | ||
| 输出格式 | ||
| 文件删除策略 | ||
| 平台 | ||
| AI Contract Analysis | Pro+ | |
| Document Workspace (folders, tags, search) | ||
| Total tools | 101 | 40+ |
| Output formats | 20+ (PDF, Word, Excel, PPT, JPG, PNG, etc.) | ~15 formats |
| File deletion policy | Auto-deleted after 1 hour | Not clearly disclosed |
| Platform | Any browser (no install) | Browser + desktop app (Windows) |
为什么切换到 WhiskFile
- 专为速度设计的现代、简洁 UI
- 面向 Pro 用户的 AI 功能（总结、聊天、脱敏）
- 包含 38 个端点的 REST API
- 所有方案均无广告
- 拥有 9 款 PDF24 所不具备的独家工具
PDF24 在以下情况下仍然胜出
- 您每天需要超过 7 次免费任务处理且不想付费
- 您需要通过桌面应用程序进行离线处理
何时从 PDF24 切换到 WhiskFile
- 您想要一个更快、更简洁且不会造成认知负担的界面
- 您需要 AI 功能
- 您正在处理敏感文档，并希望获得无广告的隐私保护
Common Workflows Compared
Merge multiple PDFs
Upload → reorder → Merge → download. Modern drag-and-drop, no ads.
Upload → reorder → Merge → download. Free and unlimited, but with ads.
Compress a large PDF
Upload → choose compression level → download. Clean UI.
Upload → auto-compress → download. Free, no limit, but dated interface.
Convert PDF to Word
Upload PDF → auto-converts → download DOCX. Free, no ads.
Upload → converts → download. Free, unlimited, ads shown.
Privacy & Security Comparison
| Privacy aspect | WhiskFile | PDF24 |
|---|---|---|
| Browser processing | Yes — most tools (69 of 101) | No — server-side processing for web tools (EU servers); desktop app processes locally |
| File retention | Auto-deleted after 1 hour | Auto-deleted within 1 hour (web tools); desktop app processes locally |
| Encryption | TLS 1.3 in transit, AES-256 at rest | Not publicly specified |
| GDPR | Compliant | German company (Geek Software GmbH) — EU data residency |
OCR & AI Features
OCR
- WhiskFile
- Free for all users
- PDF24
- Yes — completely free with no page or file limit
PDF24 offers the most generous free OCR among competitors — no restrictions
AI Features
- WhiskFile
- Pro+ (Chat, Summarize, Redact)
- PDF24
- None
PDF24 does not offer any AI-powered features
Cloud Integrations
| Integration | WhiskFile | PDF24 |
|---|---|---|
| Google Drive | On roadmap | |
| Dropbox | On roadmap | |
| OneDrive | On roadmap | |
| API access | Pro+ (38 endpoints) | Premium only (~€8.99/month) |
如何从 PDF24 切换
两者均为基于 Web 的工具。WhiskFile 的免费层级涵盖了大多数普通用户（每天 7 次任务）。如果您经常达到限制，每月 4.99 美元的 Pro 方案可取代广告支持的体验，并提供无限任务处理。
How We Compare PDF Tools
We compare publicly documented features, limits, pricing, supported formats, integrations, account requirements, and privacy information. Competitor information can change, so pricing and limits should be checked against the provider's current documentation.
Last reviewed: September 24, 2026
我们的评测
在免费使用量方面，PDF24 很难被超越——它依靠广告支持，提供近乎无限的任务处理。如果您每天处理大量文件，且不介意广告或陈旧的界面，PDF24 是一个强大的免费选择。当您看重现代化的界面、AI 功能、开发者 API 以及无广告体验时，WhiskFile 是更好的选择。
常见问题
- PDF24 是完全免费的吗？
- PDF24 可以免费使用，但有广告支持。它通过使用过程中显示的广告来获利。它没有付费方案——其收入模式完全基于广告。
- 既然 PDF24 是无限且免费的，为什么还要选择 WhiskFile？
- WhiskFile 的用户体验要好得多，它拥有 PDF24 完全缺失的 AI 功能，且 REST API 对开发者非常有用。如果您每天处理大量文件且 7 次免费任务的限制对您造成了困扰，每月 4.99 美元的 WhiskFile Pro 可以移除所有限制且无广告。
- PDF24 有移动端 App 吗？
- PDF24 有桌面应用程序。在移动端方面，WhiskFile 和 PDF24 都是基于浏览器的工具，可以在移动浏览器上使用。
- Does PDF24 have AI features?
- No. PDF24 does not offer any AI-powered features — no PDF summarization, no chat with documents, no PII redaction. WhiskFile Pro includes all three.
- Is PDF24 safe to use?
- PDF24 is a German company (Geek Software GmbH) with EU data residency. Web tools process files server-side; the desktop app processes locally. Their privacy policy states web files are deleted within 1 hour, similar to WhiskFile.
- Can I use PDF24 on Mac?
- PDF24's desktop app is Windows-only. The web tools work on any OS including Mac. WhiskFile is browser-based and works on all platforms without installation.
- Does PDF24 have a REST API?
- PDF24 does not offer a free REST API. An API is available through a Premium plan (~€8.99/month). WhiskFile Pro includes a REST API with 38 endpoints at $4.99/month.
- Which has better OCR — WhiskFile or PDF24?
- Both offer free OCR. PDF24's OCR has no file or page limit — the most generous free OCR among competitors. WhiskFile OCR supports 100+ languages and includes AI-enhanced OCR on Pro. PDF24 has the edge for volume; WhiskFile has the edge for accuracy and language support.
- Why does PDF24's UI look outdated?
- PDF24 focuses on functionality over design. Its ad-supported model hasn't prioritized UI investment. WhiskFile was designed ground-up with a modern interface, dark mode, and responsive layouts.
Sources
- Tools homepage checked 2026-09-24
- Privacy policy checked 2026-09-24
- FAQ checked 2026-09-24
- Security info checked 2026-09-24