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視障者用電腦卡關?NVDA 免費讀屏能做什麼
視覺障礙者或重度視力衰退的人,坐在電腦前不是「看不到螢幕」這麼簡單——是滑鼠游標不知道在哪、視窗開了幾個搞不清楚、網頁讀到哪一段完全沒概念。明明文書、上網、收信都是日常需求,卻因為讀不到畫面,每一步都卡在「現在到底發生什麼事」。這種狀況下,需要的不是放大鏡,而是把螢幕上的文字變成聲音或點字,讓操作者用聽的、用摸的就知道系統狀態。
一般人直覺會想到「把字放大」或「請人幫忙唸」,但前者對全盲沒用,後者不可能隨時在旁邊。系統內建的朗讀功能往往只覆蓋特定程式,遇到網頁或 Office 就斷斷續續。這類工具的切入點,是直接攔截系統和應用程式送出的文字資訊,再用語音合成或點字顯示器輸出,讓使用者在沒有視覺輔助的狀態下,照樣能操作 Windows、瀏覽網頁、編輯文件。
01NVDA 是什麼?裝了之後到底能做什麼?
NVDA 是一套免費、開源的螢幕閱讀器,安裝後會用合成語音讀出螢幕上的文字,也能搭配點字顯示器輸出。它讓視障者可以操作 Windows 桌面、瀏覽網頁、使用 Microsoft Office、記事本,以及 Outlook、Thunderbird 等郵件軟體。啟動方式是按下 Ctrl + Alt + N,之後用 Tab 和方向鍵就能在視窗和選單之間移動,系統會即時唸出焦點所在的位置。
02它能不能讀網頁?用鍵盤要怎麼瀏覽?
可以。NVDA 支援 Chrome、Firefox、Edge 等主流瀏覽器,開啟網頁後,用方向鍵上下移動就能逐行讀出文字,按 H 鍵跳到下一個標題,按 K 鍵跳到連結。不需要滑鼠,整頁內容都可以靠鍵盤讀完。遇到圖片或按鈕,它會唸出替代文字或「按鈕」之類的提示,讓你知道這個元素可以做什麼。
03可以接點字顯示器嗎?要怎麼設定?
可以。NVDA 支援多種可更新式點字顯示器,透過 USB 或藍牙連線,然後在 NVDA 的設定選單裡找到「點字」項目,選擇你的顯示器型號並調整相關參數。設定完成後,螢幕上的文字會即時轉成點字輸出,適合不想一直聽語音、或需要精確確認拼字的使用者。
04它一定要安裝才能用嗎?能不能帶著走?
不必安裝。NVDA 提供可攜版,可以把程式直接放到 USB 隨身碟裡,插到任何一台 Windows 電腦上就能執行,不需要在該台電腦上安裝軟體。這對需要在不同地方使用電腦的人很方便,例如在學校、圖書館或別人的電腦上,插入隨身碟啟動 NVDA 就能開始操作。
05它支援哪些 Windows 版本?對電腦硬體有要求嗎?
官方說明支援 Windows 7、8、10、11,32 位元和 64 位元都行。硬體需求是處理器 1 GHz 以上、建議 2 GB 記憶體、100 MB 可用磁碟空間,並需要音效輸出裝置來播放語音。點字顯示器是選配,沒有也可以只用語音。整體來說,一般文書用的電腦都跑得動。
06完全看不到的人適合用嗎?還是只有弱視的人能用?
全盲使用者是 NVDA 的主要對象,因為它完全靠語音和點字輸出,不需要任何視覺回饋。弱視的人也可以搭配螢幕放大鏡工具一起使用,NVDA 本身有與放大工具整合的能力,讓還有一點殘餘視力的人同時用聽的和看的來操作。兩種狀況都適用,差別在於怎麼搭配其他輔具。
07不想花錢買商業讀屏軟體的人,用 NVDA 夠嗎?
如果你的需求是讀網頁、用 Office、收發郵件、操作 Windows 基本功能,NVDA 都能勝任,而且完全免費。它更新頻繁,近兩年有多次版本釋出,代表持續在維護。但如果你需要的是商業軟體才有的進階功能,例如更細緻的語音品質或特定專業應用程式的深度整合,NVDA 可能就沒有那些東西。
08它的介面是英文的,不會英文的人能操作嗎?
官方介面語系是英文,但 NVDA 本身支援多種語言的語音輸出,也就是說,它可以用中文或其他語言朗讀螢幕內容。不過,設定選單、快速鍵說明這些操作介面是英文,對完全不懂英文的人來說,初始設定會比較吃力。建議找懂英文的人協助完成第一次設定,之後日常使用主要靠鍵盤指令,不太需要一直看選單。
09有些程式它讀不到,遇到這種情況怎麼辦?
官方說明指出,NVDA 支援大多數標準應用程式,但某些專有或客製化軟體可能功能有限。如果你常用的程式讀不到內容,可以先確認該程式是否有無障礙支援或替代方案,或者改用網頁版。NVDA 本身沒有辦法解決所有應用程式的相容問題,這部分需要自行測試或尋找其他輔助工具搭配。
10它的語音聽起來很機械,會不會影響長時間使用?
官方說明坦承,NVDA 的語音合成品質比商業付費方案粗糙,聽起來確實比較機械。對長時間聆聽的人來說,這可能造成疲勞,但很多人會透過調整語速、音調和詳細程度來改善。如果你對語音品質非常敏感,可以考慮安裝其他語音引擎,但這需要額外設定,而且效果因人而異。
11跟其他讀屏軟體比起來,NVDA 的評價如何?
在收錄的評分中,NVDA 有 168 人評分,平均 8.18 分(滿分 10 分)。這個分數不算低,但評分人數不算多,參考價值有限。跟它放在一起比較的 Foxit Reader、Adobe Digital Editions、ALLPlayer 都不是讀屏軟體,類別不同,無法直接對比。如果你在考慮付費讀屏,建議先試用 NVDA,確認基本需求能不能滿足,再決定要不要花錢。
下載與官方連結
nvda_2020.3.exe · 24.4 MB · 連結指向軟體原廠
版本紀錄
- 2026-10-26 NVDA 2026.3 66.14 MB
- 2026-05-06 NVDA 2026.1 59.96 MB
- 2026-02-16 NVDA 2025.3.3 48.7 MB
再看 5 筆
- 2025-11-24 NVDA 2025.3.1 48.72 MB
- 2025-11-24 NVDA 2025.3.2 48.72 MB
- 2025-09-15 NVDA 2025.3 48.73 MB
- 2025-08-13 NVDA 2025.2 44.03 MB
- 2025-06-23 NVDA 2025.1.2 42.34 MB
這一版改了什麼
What's new in this version:
- This release includes several large improvements to stability and performance particularly in Microsoft Office applications. There are new settings to toggle touchscreen support and graphics reporting. The existence of marked (highlighted) content can be reported in browsers, and there are new German braille tables.
- New Features
- You can now toggle reporting of graphics from NVDA's document formatting settings. Note that disabling this option will still read the alternative texts of graphics
- You can now toggle NVDA's touchscreen support. An option has been added to the Touch Interaction panel of NVDA's settings. The default gesture is NVDA+control+alt+t
- Added new German braille tables
- NVDA now detects read-only text UIA controls
- The existence of marked (highlighted) content is reported in both speech and braille in all web browsers
- This can be toggled on and off by a new NVDA Document Formatting option for Highlighting
- New emulated system keyboard keys can be added from NVDA's Input gestures dialog
- To do this, press the add button after you selected the Emulated system keyboard keys category
- Handy Tech Active Braille with joystick is now supported
- "Automatic focus mode for caret movement" setting is now compatible with disabling "Automatically set focus to focusable elements"
Changes:
- The Repor:t formatting script (NVDA+f) has now been changed to report the formatting at the system caret rather than at the review cursor position. To report formatting at the review cursor position now use NVDA+shift+f
- NVDA no longer automatically sets the system focus to focusable elements by default in browse mode, improving performance and stability
- CLDR updated from version 36.1 to version 37
- Updated eSpeak-NG to 1.51-dev, commit 1fb
- You can now utilize table navigation in list boxes with checkable list items when the particular list has multiple columns
- In the Add-ons manager, when prompted to confirm removal of an add-on, "No" is now the default
- In Microsoft Excel, the Elements List dialog now presents formulas in their localized form
- NVDA now reports the correct terminology for notes in MS Excel
- When using the "move review cursor to focus" command in browse mode, the review cursor is now set at the position of the virtual caret
- Information reported in browse mode, such as the formatting info with NVDA+F, are now displayed in a slightly bigger window centered on screen
Bug Fixes:
- NVDA now always speaks when navigating by word and landing on any single symbol followed by white space, whatever the verbosity settings
- In applications using QT 5.11 or newer, object descriptions are again reported
- When deleting a word with control+delete, NVDA no longer remains silent
- Now the word to the right of the deleted word is announced
- In general settings panel, the language list is now sorted correctly
- In the Input Gestures dialog, significantly improved performance while filtering
- You can now send Unicode characters beyond U+FFFF from a braille display
- NVDA will announce Open With dialog content in Windows 10 May 2020 Update
- A new experimental option in Advanced settings (Enable selective registration for UI Automation events and property changes) can provide major performance improvements in Microsoft Visual Studio and other UIAutomation based applications if enabled
- For checkable list items, the selected state is no longer announced redundantly, and if applicable, the unselected state is announced instead
- On Windows 10 May 2020 Update, NVDA now shows the Microsoft Sound Mapper when viewing output devices from synthesizer dialog
- In Internet Explorer, numbers are now announced correctly for ordered lists if the list does not start with 1
- In Google chrome, NVDA will now report not checked for all checkable controls (not just check boxes) that are currently not checked
- It is once again possible to navigate in various controls when NVDA's language is set to Aragonese
- NVDA should no longer sometimes freeze in Microsoft Word when rapidly arrowing up and down or typing characters with Braille enabled
- NVDA no longer appends nonexistent trailing space when copying the current navigator object to the clipboard
- NVDA no longer activates the Say All profile if there is nothing to read
- NVDA is no longer unable to read the features list in Internet Information Services (IIS) Manager
- NVDA now keeps the audio device open improving performance on some sound cards
- NVDA will no longer freeze or exit when holding down control+shift+downArrow in Microsoft Word
- The expanded / collapsed state of directories in the navigation treeview on drive.google.com is now always reported by NVDA
- NVDA will auto detect the NLS eReader Humanware braille display via Bluetooth as its Bluetooth name is now "NLS eReader Humanware"
- Major performance improvements in Visual Studio Code
Changes For Developers:
- The GUI Helper's BoxSizerHelper.addDialogDismissButtons supports a new "separated" keyword argument, for adding a standard horizontal separator to dialogs (other than messages and single input dialogs)
- Additional properties were added to app modules, including path for the executable (appPath), is a Windows Store app (isWindowsStoreApp), and machine architecture for the app (appArchitecture)
- It is now possible to create app modules for apps hosted inside wwahost.exe on Windows 8 and later
- A fragment of the log can now be delimited and then copied to clipboard using NVDA+control+shift+F1
- NVDA-specific objects that are found by Python's cyclic garbage collector are now logged when being deleted by the collector to aide in removing reference cycles from NVDA
- The majority of NVDA's classes are tracked including NVDAObjects, appModules, GlobalPlugins, SynthDrivers, and TreeInterceptors
- A class that needs to be tracked should inherit from garbageHandler.TrackedObject
- Significant debug logging for MSAA events can be now enabled in NVDA's Advanced settings
- MSAA winEvents for the currently focused object are no longer filtered out along with other events if the event count for a given thread is exceeded