Sp1ke Manga & Image Translator by Sp1ke

NEW in version 1.4.5: the extension has a brand-new theme! The settings window and the floating button now have a black-and-white manga style. This update also adds a learning mode that shows the original text under each translation, sound effects shown as small labels, and a names glossary for each series that you can export and share.

Sp1ke Image Translator reads the text inside pictures on a web page and shows the translation right on top of the image, in a matching style, so you can keep reading naturally.

Features

• Translates the text inside images on any website, drawn over the original speech bubbles.
• Finds the language of the pictures by itself, even when the page is in another language.
• Click (or tap) a translated bubble to see the original text, copy it, or correct the translation by hand.
• Names glossary: write how a name should look once, and it is used on every page – for all websites or just the series you are reading. Export and import lists to share them with friends.
• Learning mode: see the original text in small letters under each translation.
• Translate an area: drag over any part of the screen to translate it (Alt+Shift+S, desktop). Alt+Shift+Y translates the picture under the mouse.
• Next chapter in advance: once a chapter is done, the next one is prepared in the background (desktop).
• Read aloud: the translated bubbles can be read out loud, in order, with your browser's voices.
• Reads horizontal and vertical text, including Japanese and Chinese columns.
• Sound effects drawn on the artwork can be translated, shown as a small label so the art stays visible, or left as they are.
• Optional: add your own DeepL API key for higher-quality translations.
• The extension's own menus follow your browser language.

Private by design

• Images are read on your own device and are never uploaded.
• Only the extracted text (never the image) is sent to an online translation service, because Firefox has no built-in offline translator.
• Your glossary and DeepL key stay in your browser.
• No accounts, no ads, no tracking.

You stay in control

• Tap the floating "Translate?" button and choose "Translate now", or turn on "Always translate on this site" for the sites you read often.
• On desktop you can also right-click an image and choose "Translate this image".
• "Don't show on this website" hides the floating button on sites where you don't need it.
• Or choose "Show only on" and list the websites where the floating button may appear; it stays away from every other site.
• Hold Shift to peek at the original, or press Alt+Shift+T to switch back and forth (desktop).
• Choose the font, text size, background style and letter case.

Works on Firefox for Android too. Open the extension's settings from the Firefox menu (⋮ → Extensions → Sp1ke Image Translator).