• English

      • Changelog

      Upcoming features: add AI polishing for translated subtitles.

      • 2026.06.01: Added GitHub Models; thinking-control overhaul.
        • New LLM provider GitHub Models: authenticates with a GitHub PAT (models:read scope), with a free tier tiered per model (GPT-4.1 / 4.1 Mini / 4o Mini, Mistral Medium 3, Phi-4, Llama 3.3 70B) — a good no-cost entry point for users without a paid key. The gateway doesn't support reasoning params, so no thinking toggle is shown.
        • Thinking-control overhaul: Mistral (Medium 3.5 / Small 4) and Cohere Command A Reasoning move from always-on to an off / on toggle; Perplexity Sonar Deep Research gains off / low / medium / high.
        • Custom (unlisted) models on a thinking-capable provider get a new three-state off / on / auto control: off explicitly disables, on enables, auto omits the param to follow the model's default (a fallback for strict providers that error on non-thinking models); defaults to off.
        • Fix: provider selection guard is now purely derived, so a stale bundle no longer silently overrides the user's choice.
      • 2026.05.26: Translation engine deep-tuning.
        • New opt-in maxTokens cap for Custom (OpenAI-compatible) to prevent local small-model repetition loops; finish_reason=length truncation detection added to Claude / Gemini / OpenAI-compat
        • Default contextWindow for Custom local LLM lowered from 100 to 30 to match the behavior of models under 14B
        • Failure handling: failed lines now auto-fill with original text (output always usable); whole-language failures in multi-language mode aggregate into a dedicated panel with one-click copy-target-language for retry
        • SRT / VTT bilingual mode adds an ASS output option with separate Default / Secondary styles for original and translation — independent font/color/size tweaks in any subtitle editor
        • Friendly error messages for NetworkError / timeout / cascaded abort — no more raw "Failed to fetch"
        • Thinking mode toggle now stored per model; UI auto-distinguishes three-level (off/low/med/high) / binary (off/on) / low-high-only effort variants; intrinsic-thinking SKUs no longer show a useless toggle
        • Language picker overhaul: 122 languages grouped by geography + speaker count; multi-language mode adds Top 10 / Europe / East Asia / Indian Subcontinent presets; single-language mode remembers the last 5 picks; mobile collapses to a single column
        • DeepLX moved below DeepL in the service dropdown (brand-grouped, stable version first)
      • 2026.05.06: Service catalog v2 — major release.
        • New MT service: TranslateGemma (Google's translation-specialized Gemma derivative, self-hosted)
        • New LLM providers: MiniMax, Tencent Hunyuan, Baidu ERNIE (Qianfan), Cohere
        • Quick-pick regional endpoints across providers (Mainland CN / International / US, etc.)
        • Thinking mode + reasoning effort (low / medium / high) for DeepSeek, NVIDIA NIM, Claude, etc.
        • New "skip system message" toggle for Custom (OpenAI-compatible), compatible with Gemma chat templates
        • URL field auto-completes /v1/chat/completions on blur — guards against misusing Responses / legacy completions
        • Standalone Prompt preset management (decoupled from LLM API presets, freely combinable)
        • Main page now shows an API Status badge plus a one-click source/target language swap
        • Fixed: cache writes were happening even when caching was disabled; LLM-backed MT (Qwen-MT, TranslateGemma) retry behavior now aligns with LLM
      • 2025.07.29: Added context-aware translation for AI mode.
      • 2025.03.20: Completed i18n (internationalization); fixed known bugs including cache key issues; project open-sourced.
      • 2025.02.28: Added support for custom system and user prompts for LLM model translations.
      • 2025.02.27: Enhanced timeline compatibility for bilingual subtitles, supporting formats that omit the default hour, exceed 100 hours, and display 1 to 3 millisecond digits.
      • 2025.02.21: Added support for batch translating into multiple languages at once.
      • 2025.02.08: Fixed encoding detection issue in multi-file mode; added interfaces for OpenAI and Groq (feedback for other interfaces is welcome).
      • 2025.02.06: Added Siliconflow API; added temperature setting for LLM models to control AI translation randomness.
      • 2025.02.05: Fixed an issue where blank lines and DeepLX line breaks were ignored during chunked translation; added separate chunk translation parameters for different APIs.
      • 2025.01.18: Added support for automatic encoding detection for uploaded files; added an option to display translated content above or below the original subtitle line.
      • 2025.01.13: Added a self-hosted DeepLX interface; refactored translation API settings into a separate component to simplify frontend logic.
      • 2025.01.10: Added DeepSeek translation interface. Fixed DeepLX subtitle line break issue; improved translation language search and detection (added support for searching in Chinese/English).
      • 2024.12.19: Added automatic detection for single-file vs. multi-file mode; added automatic source language detection; improved file export naming convention for single-file translations.
      • 2024.12.12: Used p-limit to restrict concurrency, significantly reducing errors with free APIs.
      • 2024.10.12: Added a custom delay setting for the GTX API. (Based on feedback, the previous setting could easily hit the limit after 150 requests, while lower numbers didn't require adjustment).
      • 2024.09.08: Added batch translation limits for the GTX API to ensure stability. Added support for Traditional Chinese.
      • 2024.09.07: Improved recognition of WebVTT format; set .ass as the default format for bilingual subtitles and added compatibility for multi-line bilingual processing.
      • 2024.09.06: Added local caching for translation results to speed up the translation of repeated content.
      • 2024.09.05: Added functionality to skip purely numeric or character-based content to avoid unnecessary translations.
      • 2024.08.13: Added bilingual subtitle output feature.
      • 2024.07.11: Added automatic subtitle format matching in single-file mode.
      • 2024.07.06: Added support for .vtt and .ass subtitle formats.
      • 2024.07.05: Expanded supported languages for subtitle translation to 35.
      • 2024.06.26: Added a feature to extract only the subtitle content.