⚡ 簡単な評価:
- 価格: Nitro PDF starts at $15/user/month. UPDF starts at $39.99/year.
- 最適な用途: Nitro PDF for Office-heavy teams. UPDF for solo users who want AI help.
- 主な違い： Nitro focuses on conversion, eSigning, and 安全. UPDF adds an AI アシスタント and Android support.
- 私たちのおすすめ： Nitro PDF for most 仕事 users. Its conversion and security tools are deeper.
NitroPDF vs UPDF both ピッチ themselves as cheaper Adobe Acrobat alternatives.
After comparing them, they are not chasing the same user.
Nitro PDF is a business-first PDF editor built around Office files.
UPDF is a budget, AI-first tool that runs on almost any device.
The right pick depends on how you work with PDF documents every day.
概要
We reviewed documentation, pricing pages, and customer reviews for both tools.
私たちのライター陣は、それぞれの動物と実際に触れ合う時間も設けました。
それらのメモは、以下の「チームが気づいたこと」のセクションに記載されています。
By the end, you’ll know which tool fits your workflow and budget.
Nitro PDFとは何ですか?
Nitro PDF Pro is a PDF editing app with built-in electronic signatures.
It was built as an alternative to Adobe Acrobat for 中小企業 そして個人。
It’s designed to simplify working with PDFs from one ribbon.
That ribbon looks a lot like Microsoft Office, so it feels familiar fast.
Nitro Pro is the older product name you’ll still see on many forums.
Watch this short review to see the interface in action.
🏆 Winner: Nitro PDF
Convert Word, Excel, and PowerPoint files in one click. Sign and lock files without leaving the app.
Nitro PDF の価格設定
Nitro mixes subscription and one-time plans. Here’s the breakdown.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 標準 | 1ユーザーあたり月額15ドル | 個人および小規模チーム |
| プラス | カスタム | Larger teams needing admin tools |
| クラシック | 270ドル（1回限り） | People who hate subscriptions |
Pricing verified October 2026.
無料トライアル: Yes. You get 14 days, and no credit card is required.
返金保証: Check refund terms at checkout. The trial is the safer way to test.
📌 注記： The price per license is the same on Mac and Windows. Nitro is generally 30% to 60% cheaper than Adobe Acrobat, depending on the plan.
⚠️ Price check: Some review sites list Nitro PDF Pro at $180 one-time. Others show $11.24 per user per month, about $135 a year. Prices vary by region and promo. Confirm at checkout.
Key Benefits of Nitro PDF
Here’s what makes Nitro PDF worth a look:
- Office-style interface: The ribbon mirrors Microsoft Word. Many people find it easier than Acrobat’s menus.
- Two-way Office conversion: Turn Word, Excel, or PowerPoint into PDF and back again. Formatting usually survives the trip.
- Strong file security: Add 256-bit encryption and password protection. Redaction permanently removes sensitive 文章.
- 組み込みの電子署名： Apply a legally binding signature without printing anything.
- 使用状況分析: Enterprise admins can track productivity and document ROI across teams.
- Form building: Create documents and fillable forms from scratch.
私たちのチームが気づいたこと
私たちの 作家 signed up for Nitro PDF and used it for daily editing and conversions. Here’s what stood out from that hands-on time:
Nitro PDF Pros & Cons
✅ メリット
- Familiar Office-like ribbon that beginners pick up quickly
- Converts Word, Excel, PowerPoint, and images to PDF and back
- 256-bit encryption, permissions, and true redaction
- One-time Classic license for people who avoid subscriptions
❌ デメリット
- No AI assistant for summaries or chat
- Can be overkill for casual users with simple needs
- No Android app
UPDF とは何ですか?
UPDF is an AI-powered PDF editor from developer Superace Software Technology.
It lets you read, edit, annotate, organize, and convert PDF files.
The app is compatible with Windows, Mac, iOS, and Android.
Its big hook is UPDF AI, which can summarize, translate, and explain files.
Many buyers pick it as a cost-effective Adobe Acrobat swap.
This video walks through the main tools.
UPDF
Chat with your PDFs and turn them into mind maps. One license works across four devices.
UPDFの価格
UPDF sells yearly plans for each core product.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| UPDFプロ | 年間39.99ドル | Editing, OCR, and conversion |
| AIアシスタント | 年間79ドル | Chat, summaries, and translation |
| UPDFサイン | 年間69ドル | Sending and signing contracts |
Pricing verified October 2026.
無料トライアル: Yes. The free version lets you test most tools, but saved files carry a watermark.
返金保証: UPDF publishes a transparent refund policy on its website.
📌 注記： One license covers up to four devices across desktop and mobile. Free users get 1 GB of cloud storage. Paid users get 10 GB.
⚠️ Price check: Some review sites mention a Pro Lifetime Plan for around $69.99 one-time. Promos change often, so confirm the current offer at checkout.
Key Benefits of UPDF
Here’s where UPDF earns its place:
- UPDF AI assistant: Chat with a PDF and ask questions about it. Chat usage has no caps on the AI plan.
- Full-file translation: Translate a whole PDF while keeping the original layout.
- Mind maps: Turn long reports into visual mind maps in seconds.
- Every major platform: Get it on various platforms, from desktop to the App Store and Google Play.
- Beginner-friendly design: Reviews describe the interface as intuitive, even for non-tech-savvy people.
- 低価格： The Pro plan costs less per year than most rivals charge monthly.
私たちのチームが気づいたこと
Our writer signed up for UPDF and used its AI tools on long reports. Here’s what stood out:
UPDF Pros & Cons
✅ メリット
- AI chat, summaries, translation, and mind maps
- Runs on Windows, Mac, iOS, and Android
- Very low yearly price for the Pro plan
- Clean layout that new users learn quickly
❌ デメリット
- Customer support gets frequent complaints
- Frequent login prompts and sign-outs
- AI and eSign cost extra on top of Pro
機能比較
Below, we compare nine PDF features plus pricing. Each section shows how both apps handle the same job.
| 特徴 | ニトロ PDF | UPDF |
|---|---|---|
| 開始価格 | 1ユーザーあたり月額15ドル | 年間39.99ドル |
| One-Time License | ✅ Classic | ❌ |
| Edit Text in Existing PDFs | ✅ | ✅ |
| Office Conversion | ✅ | ✅ |
| OCR | ✅ | ✅ |
| AIアシスタント | ❌ | ✅ |
| 電子署名 | ✅ 含まれています | ✅ Separate plan |
| Redaction | ✅ | ✅ |
| Android App | ❌ | ✅ |
| 最適な用途 | ビジネスチーム | Students and solo users |
1. PDF Editing
Nitro PDF: Click into text boxes in an existing PDF to start making changes. Text edits keep your layout, fonts, and color. For big rewrites, convert the file to Word first.
UPDF: You can edit PDFs directly, including text, images, and links. It handles basic edits well. Reviews note it falls behind pricier 編集者 on advanced tasks.
![[2025] UPDF 2.0 for Windows: The Best AI PDF Editor with Smart AI, Editing, Converting & More](https://www.fahimai.com/wp-content/cache/flying-press/7P95ocRDNnU-hqdefault.jpg)
💡 プロのヒント: Heavy text edits can shift line spacing in both apps. Check each page before you send the final version.
2. Word and PowerPoint Conversion
Nitro PDF: Conversion is Nitro’s home turf. Drop a Word file in and get a clean PDF in seconds.
Slide decks work the same way. PowerPoint files keep their layout as PDFs.
You can also reverse the process. Turn a PDF back into an editable PPT deck.
UPDF: UPDF exports to Word, PPT, Excel, RTF, HTML, XML, text, and images. That’s a wide spread of formats for the price.
3. Excel and Image Conversion
Nitro PDF: Spreadsheets convert to PDF without broken columns. This helps if you send invoices or reports.
Need the データ back? Nitro pulls PDF tables into Excel so you can work with numbers again.
Images get the same treatment. Scans and photos become PDFs in one step.
And you can extract PDF pages as image files when you need them.
UPDF: UPDF also converts PDFs to Excel and to image formats like PNG. For example, you can save each page as a separate image.
4. 光学文字認識
Nitro PDF: Nitro’s optical character recognition turns scanned documents into searchable, editable files. It’s built in, so no add-on is needed.
UPDF: UPDF’s OCR converts scans into editable PDFs too. You can search the text right after the scan finishes.
![[2025] OCR PDF: Convert Scanned PDFs to Editable Text in Seconds!](https://www.fahimai.com/wp-content/cache/flying-press/rrD1IvcDaqo-hqdefault.jpg)
⚠️ 警告： Some UPDF customers say they couldn’t get help when OCR misbehaved. Test OCR on your own scans during the trial.
5. AI機能
Nitro PDF: Nitro PDF Pro has no built-in AI assistant. You won’t get summaries or chat inside the app.
UPDF: This is where UPDF pulls ahead. The UPDF AI assistant can summarize, translate, and explain a file. You can ask it questions to find answers in long reports fast.
UPDF can also turn a PDF into a mind map. It’s helpful for studying or planning.
6. eSignatures and Forms
Nitro PDF: eSigning comes built in, letting you sign without printing. You can also build fillable forms from scratch.
UPDF: You can fill and sign PDFs. For sending contracts to others, UPDF Sign is a separate yearly plan.
7. Security and Password Protection
Nitro PDF: Lock files with 256-bit encryption and password protection. Permissions let you block printing or editing rights. Redaction deletes sensitive text for good.
UPDF: UPDF offers password protection and cloud security for stored files. Its security tools are simpler than Nitro’s.
8. Platform and Device Support
Nitro PDF: Nitro runs on Windows and Mac. There’s also a version for iPad, iPhone, and iPod Touch.
UPDF: UPDF covers Windows, Mac, iOS, and Android. One license works on four devices across different platforms. Cloud storage keeps files synced on each device.
⚠️ 警告： Some people who purchased UPDF’s lifetime license report frequent login prompts and sign-outs. Others say login codes never arrive by email. Security software that clears saved logins can cause this, so check those settings first.
9. Annotation and Page Organization
Nitro PDF: Add sticky notes, highlights, comments, and shapes for team reviews. You can also merge multiple PDF files into one searchable document.
UPDF: Annotate PDFs with highlight, underline, and strikethrough. You can add shapes, add bookmarks, and search inside files. To organize PDF pages, rearrange, split, merge, crop, or delete them.
10. 価格設定とコスト
Here are both price lists side by side.
| プランレベル | ニトロ PDF | UPDF |
|---|---|---|
| 無料 | ❌（14日間無料トライアル） | Free version with watermark |
| エントリ | Standard: $15/user/month | UPDF Pro: $39.99/year |
| Add-on / Mid | Plus: Custom | AI Assistant: $79/year |
| 他の | Classic: $270 one-time | UPDF Sign: $69/year |
Nitro PDF: You pay more, but eSigning and security come in one product. The Classic plan lets you buy once and skip renewals.
UPDF: The Pro plan is cheap for core PDF features. Add AI and Sign, though, and the yearly bill climbs past $180.
さまざまなシナリオ
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| 予算が限られている | UPDF | Pro costs $39.99 per year |
| Heavy Office conversion | ニトロ PDF | Two-way Word, Excel, PPT tools |
| AI summaries and chat | UPDF | 内蔵AIアシスタント |
| Redaction and permissions | ニトロ PDF | Deeper security controls |
| Android access | UPDF | Nitro has no Android app |
| No subscription | ニトロ PDF | Classic one-time license |
💰 あなたの予算
UPDF wins if you only need core editing. Nitro makes sense when eSigning and security save your team real time.
🔌 あなたの技術スタック
Office-heavy teams fit Nitro’s ribbon and cloud services links. Mixed-device users, including Android, fit UPDF better.
📝 あなたの仕事スタイル
If you read a lot of long reports, UPDF AI saves time. If you send contracts daily, Nitro’s built-in signing helps more.
🎓 あなたの経験レベル
Both are easy for beginners. Casual users may find Nitro’s feature set more than they need.
🆓 無料トライアルとデモ
Nitro gives 14 days with no card. UPDF’s free version works, but exports carry a watermark.
🛟 サポートオプション
Support is the real problem with both. The BBB once graded Nitro an F for unanswered complaints. UPDF support draws frequent criticism too.
切り替えガイド
既にこれらのツールのいずれかをご利用ですか？切り替えた場合の変更点は以下のとおりです。
🔄 Switching from Nitro PDF to UPDF?
✅ 得られるもの：
- AI chat, summaries, and full-file translation
- Android app and four-device licensing
- Lower yearly cost for core editing
❌ 失うもの：
- Built-in eSigning with no extra plan
- Enterprise usage analytics
- The Office-style ribbon you know
📋切り替え方法：
- Save your files and templates from Nitro to a folder.
- Download UPDF and sign in.
- Launch the app, click Open File, and upload to UPDF Cloud.
🔄 Switching from UPDF to Nitro PDF?
✅ 得られるもの：
- Deeper redaction and permission controls
- eSignatures included in the product
- A one-time Classic license option
❌ 失うもの：
- The UPDF AI assistant and mind maps
- Android support
- Bundled 10 GB cloud storage
📋切り替え方法：
- Download your files from UPDF Cloud to your device.
- Start the Nitro 14-day trial.
- Open each file in Nitro and re-apply passwords.
私たちのレビューで取り上げられなかったこと
This comparison focused on individuals and small teams. We didn’t test Nitro’s Plus plan, admin rollouts, or usage analytics at scale. We also skipped very large files. We didn’t check every preferred language beyond English either.
Our notes reflect the October 2026 versions. Features and prices may change after launch of new updates.
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰価格 | UPDF |
| ✏️ PDF Editing | ニトロ PDF |
| 🔄 Office Conversion | ニトロ PDF |
| 🤖 AI機能 | UPDF |
| ✍️ eSignatures | ニトロ PDF |
| 🔒 セキュリティ | ニトロ PDF |
| 📱 Platforms | UPDF |
| 🏆総合優勝 | ニトロ PDF |
🏆 WINNER: NITRO PDF
Nitro PDF wins 4 out of 7 categories.
最適な用途: Office-heavy teams, contract signing, secure document handling
Nitro PDF is the stronger tool for business work. Its conversion, signing, and security tools cover the full document process in one app.
UPDF packs powerful features for students and solo users on a budget. If AI summaries or Android matter most, choose UPDF.
One caution for Nitro buyers. The company told owners of licenses older than version 13 to move to a subscription. Check what your license covers before you buy.
More of Nitro PDF Compared
Here’s how Nitro PDF stacks up against other alternatives:
Nitro PDF vs Foxit
Nitro PDF wins on: Office-style ribbon, built-in eSigning, and enterprise usage analytics.
Foxit wins on: a free reader, Linux support, and more cloud collaboration tools.
Nitro PDF vs PDF要素
Nitro PDF wins on: team admin plans, cleaner redaction, and stronger signing workflows.
PDFelement wins on: built-in AI tools, an Android app, and lower solo pricing.
Nitro PDF vs PDF Expert
Nitro PDF wins on: Windows support, OCR depth, and Excel conversion.
PDF Expert wins on: a native Mac feel, faster reading on iPad, and simpler annotation.
More of UPDF Compared
Here’s how UPDF stacks up against other PDF apps:
UPDF vs PDFelement
UPDF wins on: lower yearly price, mind maps, and a four-device license.
PDFelement wins on: longer track record, form tools, and batch processing.
UPDF wins on: Windows and Android apps, AI chat, and full-file translation.
PDF Expert wins on: polished Apple design, smooth reading, and stable sign-ins.
UPDF wins on: desktop apps, offline editing, and OCR.
DocHub wins on: browser-only access, Google Drive links, and quick team signing.
よくある質問
Nitro PDFは無料ですか？
No. Nitro PDF is a paid tool, but it offers a 14-day free trial. You don’t need a credit card to start.
NitroはAdobeより優れているのか？
For most small businesses, yes on value. Nitro costs 30% to 60% less and its interface feels simpler. Adobe Acrobat still has more advanced features.
Is Nitro PDF Pro a one-time purchase?
It can be. The Classic plan is a one-time $270 payment. Standard is a subscription at $15 per user per month.
UPDFは無料ですか？
Partly. The free version lets you try most tools, but saved files get a watermark. Paid plans start at $39.99 per year.
UPDFのAIは安全ですか？
UPDF is a legitimate app sold on major app stores. Still, avoid uploading highly confidential files to any AIツール. Read its privacy policy first.
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