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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_2019.1.exe · 22.97 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:
New Features:
- New braille tables: Afrikaans, Arabic 8 dot computer braille, Arabic grade 2, Spanish grade 2
- Added an option to NVDA's mouse settings to make NVDA handle situations where the mouse is controlled by another application: this will allow NVDA to track the mouse when a system is controlled remotely using TeamViewer or other remote control software
- Added the `--enable-start-on-logon` command line parameter to allow configuring whether silent installations of NVDA set NVDA to start at Windows logon or not. Specify true to start at logon or false to not start at logon. If the --enable-start-on-logon argument is not specified at all then NVDA will default to starting at logon, unless it was already configured not to by a previous installation
- It is possible to turn NVDA's logging features off by setting logging level to "disabled" from General settings panel
- The presence of formulae in LibreOffice and Apache OpenOffice spreadsheets is now reported
- In Mozilla Firefox and Google Chrome, browse mode now reports the selected item in list boxes and trees: this works in Firefox 66 and later, this does not work for certain list boxes (HTML select controls) in Chrome
- Early support for apps such as Mozilla Firefox on computers with ARM64 (e.g. Qualcomm Snapdragon) processors
- A new Advanced Settings category has been added to NVDA's Settings dialog, including an option to try out NVDA's new support for Microsoft Word via the Microsoft UI Automation API
- Added support for the graphical view in Windows Disk Management
- Added support for Handy Tech Connect Braille and Basic Braille 84
Changes:
- Updated liblouis braille translator to version 3.8.0
- Add-on authors now can enforce a minimum required NVDA version for their add-ons. NVDA will refuse to install or load an add-on whose minimum required NVDA version is higher than the current NVDA version
- Add-on authors can now specify the last version of NVDA the add-on has been tested against. If an add-on has been only tested against a version of NVDA lower than the current version, then NVDA will refuse to install or load the add-on
- This version of NVDA will allow installing and loading of add-ons that do not yet contain Minimum and Last Tested NVDA version information, but upgrading to future versions of NVDA (E.g. 2019.2) may automatically cause these older add-ons to be disabled
- The move mouse to navigator object command is now available in Microsoft Word as well as for UIA controls, particularly Microsoft Edge
- Reporting of text under the mouse has been improved within Microsoft Edge and other UIA applications
- When NVDA is started with the `--portable-path` command line parameter, the provided path is automatically filled in when trying to create a portable copy of NVDA using the NVDA menu
- Updated the path to the Norwegian braille table to reflect the standard from the year 2015
- When navigating by paragraph (control+up or down arrows) or navigating by table cell (control+alt+arrows), the existence of spelling errors will no longer be announced, even if NVDA is configured to announce these automatically. This is because paragraphs and table cells can be quite large, and detecting spelling errors in some applications can be very costly
- NVDA no longer automatically loads custom appModules, globalPlugins and braille and synth drivers from the NVDA user configuration directory. This code should be instead packaged as an add-on with correct version information, ensuring that incompatible code is not run with current versions of NVDA
Bug Fixes:
- When using OneCore speech synthesizer on Windows 10 April 2018 Update and later, large chunks of silence are no longer inserted between speech utterances
- When moving by character in plain text controls (such as Notepad) or browse mode, 32 bit emoji characters consisting of two UTF-16 code points will now read properly
- Improved restart confirmation dialog after changing NVDA's interface language. The text and the button labels are now more concise and less confusing
- If a 3rd party speech synthesizer fails to load, NVDA will fall back to Windows OneCore speech synthesizer on Windows 10, rather than espeak
- Removed the "Welcome Dialog" entry in the NVDA menu while on secure screens. (#8520)
- When tabbing or using quick navigation in browse mode, legends on tab panels are now reported more consistentl
- NVDA will now announce selection changes for certain time pickers such as in the Alarms and Clock app in Windows 10
- In Windows 10's Action Center, NVDA will announce status messages when toggling quick actions such as brightness and focus assist
- In action Center in Windows 10 October 2018 Update and earlier, NVDA will recognize brightness quick action control as a button instead of a toggle button
- NVDA will again track cursor and announce deleted characters in the Microsoft Excel go to and find edit fields
- Fixed a rare browse mode crash in Firefox
- NVDA no longer fails to report the focus for some controls in the Microsoft Office 2016 ribbon when collapsed
- NVDA no longer fails to report the suggested contact when entering addresses in new messages in Outlook 2016
- The last few cursor routing keys on 80 cell eurobraille displays no longer route the cursor to a position at or just after the start of the braille line
- Fixed table navigation in threaded view in Mozilla Thunderbird
- In Mozilla Firefox and Google Chrome, switching to focus mode now works correctly for certain list boxes and trees (where the list box/tree is not itself focusable but its items are)
- Browse mode is now correctly turned on by default when reading messages in Outlook 2016/365 if using NVDA's experimental UI Automation support for Word Documents
- NVDA is now less likely to freeze in such a way that the only way to escape is signing out from your current windows session
- In Windows 10 October 2018 Update and later, when opening cloud clipboard history with clipboard empty, NVDA will announce clipboard status
- In Windows 10 October 2018 Update and later, when searching for emojis in emoji panel, NVDA will announce top search result
- NVDA no longer freezes in the main window of Oracle VirtualBox 5.2 and above
- Responsiveness in Microsoft Word when navigating by line, paragraph or table cell may be significantly improved in some documents. A reminder that for best performance, set Microsoft Word to Draft view with alt+w,e after opening a document
- In Mozilla Firefox and Google Chrome, empty alerts are no longer reported
- Significant performance improvements when navigating cells in Microsoft Excel, particularly when the spreadsheet contains comments and or validation dropdown lists
- It should be no longer necessary to turn off in-cell editing in Microsoft Excel's options to access the cell edit control with NVDA in Excel 2016/365
- Fixed a freeze in Firefox sometimes seen when quick navigating by landmarks, if the Enhanced Aria add-on is in use