Smallpdf 对比 WhiskFile
Smallpdf 是目前最知名的在线 PDF 工具之一，但它限制免费用户每天只能合并 2 个 PDF 文件，并且会在没有明确告知的情况下自动开启 14 天试用。WhiskFile 每天为您提供 7 个免费任务，没有意外扣费，无需信用卡，且提供更多工具。
- 每天 7 个免费任务，无单项工具限制
- 无自动试用，无意外扣费，无需信用卡
- 所有方案均免费提供 OCR 功能
- REST API 拥有 38 个端点（Pro 版）
- 具备更佳隐私架构的 AI 功能
- 知名品牌 — 拥有超过 2500 万月活跃用户
- 界面简洁、精美
- Pro 层级包含基础 AI 功能
- 集成 Google Drive 和 Dropbox
- 免费版每天仅限合并 2 个文件
- 在没有明确告知的情况下自动开启 14 天试用 — 用户评论中常有意外扣费的投诉
- OCR 功能仅限付费使用
定价
| 方案 | WhiskFile | Smallpdf |
|---|---|---|
| Free tier | Free — 7 tasks/day, 50 MB | Free — 2 tasks/day per tool, 15 MB some tools |
| Pro | $4.99/month or $39.99/year | $4.99/month or $72/year |
| Teams | $29/month (10 seats) | $12/user/month (min 2) |
Pricing checked on: September 24, 2026. Smallpdf pricing page
功能对比
| 功能 | WhiskFile | Smallpdf |
|---|---|---|
| 免费版无水印 | ||
| 付费版任务无限制 | ||
| 无意外试用扣费 | Trial auto-starts without clear opt-in | |
| 文件 1 小时后自动删除 | Not clearly disclosed | |
| 按书签拆分 PDF | ||
| 按文本/关键字拆分 PDF | ||
| 贝茨编号 | ||
| 根据内容重命名 PDF | ||
| AI PDF 摘要 | Pro+ | Pro (basic) |
| AI PDF 对话 | Pro+ | Pro (basic) |
| 自动遮盖个人隐私信息 (PII) | Pro+ | |
| REST API | Pro+ (38 endpoints) | Limited (2 endpoints documented) |
| 批量处理 | Pro+ | Pro+ |
| 电子签名 / 填写表单 | ||
| OCR | Pro only | |
| 工具总数 | Pro (eSign) | |
| 输出格式 | ||
| 平台 | ||
| Accessibility Tools (checker + fix) | ||
| AI Contract Analysis | Pro+ | |
| Document Workspace (folders, tags, search) | ||
| Total tools | 101 | ~22 |
| Output formats | 20+ (PDF, Word, Excel, PPT, JPG, PNG, etc.) | ~12 formats |
| Platform | Any browser (no install) | Browser + desktop app |
WhiskFile 最适合
- 您在免费版下每天需要合并超过 2 个 PDF
- 您曾因 Smallpdf 的自动试用扣费而感到困扰
- 您需要免费使用 OCR 功能
- 您希望在不牺牲文档隐私的前提下使用 AI 功能
Smallpdf 最适合
- 您依赖工具内置的 Google Drive / Dropbox 集成功能
- 您需要使用团队已经熟悉的 Smallpdf 电子签名工作流
Which Features Matter?
If you process large PDFs
- Maximum file size limits
- Page count restrictions
- Processing speed
- Batch processing support
If you process scanned documents
- OCR availability and accuracy
- Supported OCR languages
- Searchable PDF output
- Free vs paid OCR access
If privacy matters
- Browser vs server processing
- File retention and deletion
- Encryption standards
- Privacy documentation
Common Workflows Compared
Merge multiple PDFs
Upload files → reorder → Merge → download. 7 free tasks/day, no per-tool cap.
Upload files → reorder → Merge → download. Free tier limited to 2 merges per day.
Compress a large PDF
Upload → choose compression level → download. Browser-based for most files.
Upload → Smallpdf auto-compresses → download. Server-side; free tier limits apply.
Convert PDF to Word
Upload PDF → instant conversion → download DOCX. Free, no account.
Upload PDF → Smallpdf converts server-side → download. Free with daily task limits.
OCR a scanned PDF
Upload scanned PDF → auto-OCR → searchable PDF. Free for all users.
OCR is locked behind Smallpdf Pro. Free users cannot access OCR.
Sign a PDF
Upload → draw/type signature → place → download.
Upload → draw/type/upload signature → place → download. eSign files retained 14 days.
At a Glance
WhiskFile focuses on
- Browser-based document utilities
- AI-powered PDF workflows
- Privacy-focused processing
- Developer-friendly REST API
Smallpdf focuses on
- PDF editing and conversion
- Document compression
- eSign workflows
- Cloud storage integrations
Privacy & Security
| Privacy aspect | WhiskFile | Smallpdf |
|---|---|---|
| Browser processing | Yes — most tools (69 of 101) | No — server-side processing (AWS, EU region) |
| File retention | Auto-deleted after 1 hour | Deleted within 1 hour for most tools; eSign files retained 14 days |
| Encryption | TLS 1.3 in transit, AES-256 at rest | TLS in transit; ISO 27001 certified |
| GDPR | Compliant | Compliant (eIDAS compliant for eSign) |
OCR (Optical Character Recognition)
| OCR feature | WhiskFile | Smallpdf |
|---|---|---|
| OCR available | Pro only | |
| Free access | Yes — free for all users | false |
| Languages | 100+ languages | Not publicly specified |
| Searchable PDF output | ||
| Batch OCR | Pro+ | Pro only |
OCR locked behind paid plan; not available on free tier
AI-Powered Features
| AI feature | WhiskFile | Smallpdf |
|---|---|---|
| Chat with PDF | Pro+ | Pro (limited free: 4 docs, 30 prompts/day) |
| Summarization | Pro+ | Pro (adjustable detail level) |
| Question answering | Pro+ | Pro (AI Question Generator) |
| PII auto-redaction | Pro+ | |
| Translation | Pro+ | Pro (AI PDF Translate) |
Free users get limited AI access: 4 documents, 30 prompts/day, 25K-35K word cap
Cloud Integrations
| Integration | WhiskFile | Smallpdf |
|---|---|---|
| Google Drive | On roadmap | |
| Dropbox | On roadmap | |
| OneDrive | On roadmap | |
| URL import | ||
| API access | Pro+ (38 endpoints) | Limited (2 documented endpoints) |
Chrome extension and Google Workspace add-on available
Account Requirements
WhiskFile
No — first 3 tasks without account, up to 7/day with free account
Smallpdf
Not strictly required but frequently prompted; cloud features require Pro
Supported File Formats
WhiskFile (20 formats)
Smallpdf (12 formats)
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. Information marked “Not publicly specified” means we could not verify it from the competitor's official sources at the time of review.
Last reviewed: September 24, 2026
常见问题
Smallpdf 用户最常见的抱怨是：每天 2 个文件的免费限制、自动开启试用导致的意外扣费，以及 OCR 功能需要付费。WhiskFile 解决了这三个问题。
WhiskFile 拥有 90 款工具，而 Smallpdf 约为 22 款。WhiskFile 不仅涵盖了 Smallpdf 的所有功能，还提供了独家工具，如按书签拆分、贝茨编号、按文本重命名以及按文本拆分。
是的。WhiskFile 每天免费提供多达 7 个任务，无需注册账号，也无需信用卡。不会自动开启任何试用。
是的。WhiskFile Pro 包含 AI PDF 摘要、AI PDF 对话和自动遮盖 PII 功能 — 与 Smallpdf 的 AI 功能相当，且具有更强的隐私架构（仅发送文本给 AI，而非原始文件）。
直接集成 Drive/Dropbox 的功能已在开发计划中。目前，您可以先从这些服务下载文件，然后上传到 WhiskFile — 步骤相同，只是需要手动操作。
结论
Smallpdf 拥有精美的界面和庞大的用户群，但其严格的免费层级（每天限合并 2 个文件）、自动开启试用扣费以及有限的 API 功能，使得 WhiskFile 成为那些需要更多免费额度、透明计费和开发者友好型 API 的用户的更好选择。如果您依赖 Smallpdf 的 Google Drive/Dropbox 集成功能，那么 Smallpdf 依然具有优势。
Sources
- Pricing page checked 2026-09-24
- Trust center checked 2026-09-24
- Support checked 2026-09-24
准备好试用 WhiskFile 了吗？
开始免费使用——每天 7 个任务，无需账号，无需信用卡。
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