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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_2009.1_installer.exe · 11.25 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
- Official support for 64 bit editions of Windows! (#309)
- Added a synthesizer driver for the Newfon synthesizer. Note that this requires a special version of Newfon. (#206)
- In virtual buffers, focus mode and browse mode can now be reported using sounds instead of speech. This is enabled by default. It can be configured from the Virtual buffers dialog. (#244)
- NVDA no longer cancels speech when volume control keys are pressed on the keyboard, allowing the user to change the volume and listen to actual results immediately. (#287)
- Completely rewritten support for Microsoft Internet Explorer and Adobe Reader documents. This support has been unified with the core support used for Mozilla Gecko, so features such as fast page rendering, extensive quick navigation, links list, text selection, auto focus mode and braille support are now available with these documents.
- Improved support for the date selection control found in the Windows Vista Date / Time properties dialog.
- improved support for the Modern XP/Vista start menu (specifically the all programs, and places menus). Appropriate level information is now announced.
- The amount of text that is announced when moving the mouse is now configurable from the Mouse settings dialog. A choice of paragraph, line, word or character can be made.
- announce spelling errors under the cursor in Microsoft Word.
- support for the Microsoft Word 2007 spell checker. Partial support may be available for prior Microsoft Word versions.
- Better support for Windows Live Mail. Plain text messages can now be read and both the plain text and HTML message composers are useable.
- In Windows Vista, if the user moves to the secure desktop (either because a UAC control dialog appeared, or because control+alt+delete was pressed), NVDA will announce the fact that the user is now on the secure desktop.
- NVDA can announce text under the mouse within dos console windows.
- Support for UI Automation via the UI Automation client API available in Windows 7, as well as fixes to improve the experience of NVDA in Windows 7.
- NVDA can be configured to start automatically after you log on to Windows. The option is in the General Settings dialog.
- NVDA can read secure Windows screens such as the Windows logon, control+alt+delete and User Account Control (UAC) screens in Windows XP and above. Reading of the Windows logon screen can be configured from the General Settings dialog. (#97)
- Added a driver for the Optelec ALVA BC6 series braille displays.
- When browsing web documents, you can now press n and shift+n to skip forward and backward past blocks of links, respectively.
- When browsing web documents, ARIA landmarks are now reported, and you can move forward and backward through them using d and shift+d, respectively. (#192)
- The Links List dialog available when browsing web documents has now become an Elements List dialog which can list links, headings and landmarks. Headings and landmarks are presented hierarchically. (#363)
- The new Elements List dialog contains a "Filter by" field which allows you to filter the list to contain only those items including the text that was typed. (#173)
- Portable versions of NVDA now look in the 'userConfig' directory inside the NVDA directory, for the user's configuration. Like for the installer version, this keeps the user's configuration separate from NVDA itself.
- Custom app modules, braille display drivers and synth drivers can now be stored in the user's configuration directory. (#337)
- Virtual buffers are now rendered in the background, allowing the user to interact with the system to some extent during the rendering process. The user will be notified that the document is being rendered if it takes longer than a second.
- If NVDA detects that it has frozen for some reason, it will automatically pass all keystrokes through so that the user has a better chance of recovering the system.
- Support for ARIA drag and drop in Mozilla Gecko. (#239)
- The document title and current line or selection is now spoken when you move focus inside a virtual buffer. This makes the behaviour when moving focus into virtual buffers consistent with that for normal document objects. (#210)
- In virtual buffers, you can now interact with embedded objects (such as Adobe Flash and Sun Java content) by pressing enter on the object. If it is accessible, you can then tab around it like any other application. To return focus to the document, press NVDA+space. (#431)
- In virtual buffers, o and shift+o move to the next and previous embedded object, respectively.
- NVDA can now fully access applications running as administrator in Windows Vista and later. You must install an official release of NVDA for this to work. This does not work for portable versions and snapshots. (#397)
Changes:
- NVDA no longer announces "NVDA started" when it starts.
- The startup and exit sounds are now played using NVDA's configured audio output device instead of the Windows default audio output device. (#164)
- Progress bar reporting has been improved. Most notably you can now configure NVDA to announce via both speech and beeps at the same time.
- Some generic roles, such as pane, application and frame, are no longer reported on focus unless the control is unnamed.
- The review copy command (NVDA+f10) copies the text from the start marker up to and including the current review position, rather than excluding the current position. This allows the last character of a line to be copied, which was not previously possible. (#430)
- the navigatorObject_where script (ctrl+NVDA+numpad5) has been removed. This key combination did not work on some keyboards, nore was the script found to be that useful.
- the navigatorObject_currentDimentions script has been remapped to NVDA+numpadDelete. The old key combination did not work on some keyboards. This script also now reports the width and height of the object instead of the right/bottom coordinates.
- Improved performance (especially on netbooks) when many beeps occur in quick succession; e.g. fast mouse movement with audio coordinates enabled. (#396)
- The NVDA error sound is no longer played in release candidates and final releases. Note that errors are still logged.
Bug Fixes:
- When NVDA is run from an 8.3 dos path, but it is installed in the related long path (e.g. progra~1 verses program files) NVDA will correctly identify that it is an installed copy and properly load the user's settings.
- speaking the title of the current foreground window with nvda+t now works correctly when in menus.
- braille no longer shows useless information in its focus context such as unlabeled panes.
- stop announcing some useless information when the focus changes such as root panes, layered panes and scroll panes in Java or Lotus applications.
- Make the keyword search field in Windows Help (CHM) viewer much more usable. Due to buggyness in that control, the current keyword could not be read as it would be continually changing.
- report correct page numbers in Microsoft Word if the page numbering has been specifically offset in the document.
- Better support for edit fields found in Microsoft Word dialogs (e.g. the Font dialog). It is now possible to navigate these controls with the arrow keys.
- better support for Dos consoles. specifically: NVDA can now read the content of particular consoles it always used to think were blank. Pressing control+break no longer terminates NVDA.
- On Windows Vista and above, the NVDA installer now starts NVDA with normal user privileges when requested to run NVDA on the finish screen.
- Backspace is now handled correctly when speaking typed words. (#306)
- Don't incorrectly report "Start menu" for certain context menus in Windows Explorer/the Windows shell. (#257)
- NVDA now correctly handles ARIA labels in Mozilla Gecko when there is no other useful content. (#156)
- NVDA no longer incorrectly enables focus mode automatically for editable text fields which update their value when the focus changes; e.g. http://tigerdirect.com/. (#220)
- NVDA will now attempt to recover from some situations which would previously cause it to freeze completely. It may take up to 10 seconds for NVDA to detect and recover from such a freeze.
- When the NVDA language is set to "User default", use the user's Windows display language setting instead of the Windows locale setting. (#353)
- NVDA now recognises the existence of controls in AIM 7.
- The pass key through command no longer gets stuck if a key is held down. Previously, NVDA stopped accepting commands if this occurred and had to be restarted. (#413)
- The taskbar is no longer ignored when it receives focus, which often occurs when exiting an application. Previously, NVDA behaved as if the focus had not changed at all.
- When reading text fields in applications which use the Java Access Bridge (including OpenOffice.org), NVDA now functions correctly when reporting of line numbers is enabled.
- The review copy command (NVDA+f10) gracefully handles the case where it is used on a position before the start marker. Previously, this could cause problems such as crashes in Notepad++.
- A certain control character (0x1) no longer causes strange eSpeak behaviour (such as changes in volume and pitch) when it is encountered in text. (#437)
- The report text selection command (NVDA+shift+upArrow) now gracefully reports that there is no selection in objects which do not support text selection.
- Fixed the issue where pressing the enter key on certain Miranda-IM buttons or links was causing NVDA to freeze. (#440)
- The current line or selection is now properly respected when spelling or copying the current navigator object.
- Worked around a Windows bug which was causing garbage to be spoken after the name of link controls in Windows Explorer and Internet Explorer dialogs. (#451)
- Fixed a problem with the report date and time command (NVDA+f12). Previously, date reporting was truncated on some systems. (#471)
- Fixed the issue where the system screen reader flag was sometimes inappropriately cleared after interacting with secure Windows screens. This could cause problems in applications which check the screen reader flag, including Skype, Adobe Reader and Jart. (#462)
- In an Internet Explorer 6 combo box, the active item is now reported when it is changed. (#342)