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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_2014.3.exe · 16.53 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:
- The sounds played when NVDA starts and exits can be disabled via a new option in the General Settings dialog. (#834)
- Help for add-ons can be accessed from the Add-ons Manager for add-ons which support this. (#2694)
- Support for the Calendar in Microsoft Outlook 2007 and above (#2943) including:
- Announcement of the current time when moving around with the arrow keys.
- Indication if the selected time is within any appointments.
- announcement of the selected appointment when pressing tab.
- Smart filtering of the date so as to only announce the date if the new selected time or appointment is on a different day to the last.
- Enhanced support for the Inbox and other message lists in Microsoft Outlook 2010 and above (#3834) including:
- The ability to silence column headers (from, subject, etc.) by turning off the Report Table row and column headers option in Document Formatting settings.
- The ability to use table navigation commands (control + alt + arrows) to move through the individual columns.
- Microsoft word: If an inline image has no alternative text set, NVDA will instead report the title of the image if the author has provided one. (#4193)
- Microsoft Word: NVDA can now report paragraph indenting with the report formatting command (NVDA+f). It can also be reported automatically when the new Report Paragraph indenting option is enabled in Document Formatting settings. (#4165)
- Report automatically inserted text such as a new bullet, number or tab indent when pressing enter in editable documents and text fields. (#4185)
- Microsoft word: Pressing NVDA+alt+c will report the text of a comment if the cursor is within one. (#3528)
- Improved support for automatic column and row header reading in Microsoft Excel (#3568) including:
- Support of Excel defined name ranges to identify header cells (compatible with Jaws screen reader) .
- The set column header (NVDA+shift+c) and set row header (NVDA+shift+r) commands now store the settings in the worksheet so that they are available the next time the sheet is opened, and will be available to other screen readers that support the defined name range scheme.
- These commands can also now be used multiple times per sheet to set different headers for different regions.
- Support for automatic column and row header reading in Microsoft Word (#3110) including:
- Support of Microsoft Word bookmarks to identify header cells (compatible with Jaws screen reader). - set column header (NVDA+shift+c) and set row header (NVDA+shift+r) commands while on the first header cell in a table allow you to tell NVDA that these headers should be reported automatically. Settings are stored in the document so that they are available the next time the document is opened, and will be available to other screen readers that support the bookmark scheme.
- Microsoft Word: Report the distance from the left edge of the page when the tab key is pressed. (#1353)
- Microsoft Word: provide feedback in speech and braille for most available formatting shortcut keys (bold, italic, underline, alignment, outline level, superscript, subscript and font size). (#1353)
- Microsoft Excel: If the selected cell contains comments, they can be now reported by pressing NVDA+alt+c. (#2920)
- Microsoft Excel: Provide an NVDA-specific dialog to edit the comments on the currently selected cell when pressing Excel's shift+f2 command to enter comment editing mode. (#2920)
- Microsoft Excel: speech and braille feedback for many more selection movement shortcuts (#4211) including:
- Vertical page movement (pageUp and pageDown);
- Horizontal page movement (alt+pageUp and alt+pageDown);
- Extend selection (the above keys with Shift added); and
- Selecting the current region (control+shift+8).
- Microsoft Excel: The vertical and horizontal alignment for cells can now be reported with the report formatting command (NVDA+f). It can also be reported automatically if the Report alignment option in Document Formatting settings is enabled. (#4212)
- Microsoft Excel: The style of a cell can now be reported with the report formatting command (NVDA+f). It can also be reported automatically if the Report Style option in Document formatting settings is enabled. (#4213)
- Microsoft PowerPoint: when moving shapes around a slide with the arrow keys, the shape's current location is now reported (#4214) including:
- The distance between the shape and each of the slide edges is reported.
- If the shape covers or is covered by another shape, then the distance overlapped and the overlapped shape are reported.
- To report this information at any time without moving a shape, press the report location command (NVDA+delete).
- When selecting a shape, if it is covered by another shape, NVDA will report that it is obscured.
- The report location command (NVDA+delete) is more context specific in some situations. (#4219)
- In standard edit fields and browse mode, the cursor position as a percentage through the content and its screen coordinates are reported.
- On shapes in PowerPoint Presentations, position of the shape relative to the slide and other shapes is reported.
- Pressing this command twice will produce the previous behaviour of reporting the location information for the entire control.
- New language: Catalan.
Changes:
- Updated liblouis braille translator to 2.5.4. (#4103)
Bug Fixes:
- In Google Chrome and Chrome-based browsers, certain chunks of text (such as those with emphasis) are no longer repeated when reporting the text of an alert or dialog. (#4066)
- In browse mode in Mozilla applications, pressing enter on a button, etc. no longer fails to activate it (or activates the wrong control) in certain cases such as the buttons at the top of Facebook. (#4106)
- Useless information is no longer announced when tabbing in iTunes. (#4128)
- In certain lists in iTunes such as the Music list, moving to the next item using object navigation now works correctly. (#4129)
- HTML elements considered headings because of WAI ARIA markup are now included in the Browse mode Elements list and quick navigation for Internet Explorer documents. (#4140)
- Following same-page links in recent versions of Internet Explorer now correctly moves to and reports the destination position in browse mode documents. (#4134)
- Microsoft Outlook 2010 and above: Overall access to secure dialogs such as the New profiles and mail setup dialogs has been improved. (#4090, #4091, #4095)
- Microsoft Outlook: Useless verbosity has been decreased in command toolbars when navigating through certain dialogs. (#4096, #3407)
- Microsoft word: Tabbing to a blank cell in a table no longer incorrectly announces exiting the table. (#4151)
- Microsoft Word: The first character past the end of a table (including a new blank line) is no longer incorrectly considered to be inside the table. (#4152)
- Microsoft Word 2010 spell check dialog: The actual misspelled word is reported rather than inappropriately reporting just the first bold word. (#3431)
- In browse mode in Internet Explorer and other MSHTML controls, tabbing or using single letter navigation to move to form fields again reports the label in many cases where it didn't (specifically, where HTML label elements are used). (#4170)
- Microsoft Word: Reporting the existance and placement of comments is more accurate. (#3528)
- Navigation of certain dialogs in MS Office products such as Word, Excel and Outlook has been improved by no longer reporting particular control container toolbars which are not useful to the user. (#4198)
- Task panes such as clipboard manager or File recovery no longer accidentilly seem to gain focus when opening an application such as Microsoft Word or Excel, which was sometimes causing the user to have to switch away from and back to the application to use the document or spreadsheet. (#4199)
- NVDA no longer fails to run on recent Windows Operating Systems if the user's Windows language is set to Serbian (Latin). (#4203)
- Pressing numlock while in input help mode now correctly toggles numlock, rather than causing the keyboard and the Operating System to become out of sync in regards to the state of this key. (#4226)
- In Google Chrome, the title of the document is again reported when switching tabs. In NVDA 2014.2, this did not occur in some cases. (#4222)
- In Google Chrome and Chrome-based browsers, the URL of the document is no longer reported when reporting the document. (#4223)
- When running say all with the No speech synthesizer selected (useful for automated testing), say all will now complete instead of stopping after the first few lines. (#4225)
- Microsoft Outlook's Signature dialog: The Signature editing field is now accessible, allowing for full cursor tracking and format detection. (#3833)
- Microsoft Word: When reading the last line of a table cell, the entire table cell is no longer read. (#3421)
- Microsoft Word: When reading the first or last line of a table of contents, the entire table of contents is no longer read. (#3421)
- When speaking typed words and in some other cases, words are no longer incorrectly broken at marks such as vowel signs and virama in Indic languages. (#4254)
- Numeric editable text fields in GoldWave are now handled correctly. (#670)
- Microsoft Word: when moving by paragraph with control+downArrow / control+upArrow, it is no longer necessary to press them twice if moving through bulleted or numbered lists. (#3290)