Text Translation

Optimal Translation

Multi-Model Intelligent Text Translation

Free text translation and the industry-first Optimal Translation — fast and efficient text translation paired with accurate and reliable Optimal Translation. Powered by 20+ leading AI models including DeepSeek, GPT and Gemini, supporting 100+ language pairs.

Instant Response

Type and translate — get results in seconds, even for long texts.

100+ Language Pairs

Covers major and niche languages worldwide, breaking down communication and reading barriers with ease.

Auto Language Detection

Intelligently and accurately detects the source language — just pick your target and go, no manual switching needed.

Preserve Original Formatting

Perfectly retains paragraph breaks, spacing and formatting for a seamless reading experience.

Local History Lookback

Translation history is saved locally — search, compare and reuse anytime with one click.

Free to Install & Use

Free browser extension — install and start translating right away.

Optimal Translation · Industry First

Multiple models collaborate to translate with intelligent quantitative scoring — every translation is evidence-based and quality is clear at a glance.

AI Intelligent Scoring

Multiple models translate simultaneously, and the optimal model scores each result to automatically select the best translation — more accurate and more reliable.

Side-by-Side Model Comparison

View multiple model translations, scores and explanations side by side on one screen for easy cross-checking, so every choice is backed by evidence.

Translation Quality Visualized

Multi-dimensional scoring across accuracy, fluency and terminology consistency, with detailed scoring notes for every translation.

Custom Model Combinations

Flexibly mix and match AI models for translation and scoring to suit your content type.

Segment-Level Fine-Tuning

Compare and select the best translation at the whole-text or sentence level — even long passages can be refined segment by segment.

Zero-Barrier Experience

The free version supports multi-model translation and Optimal Translation. Unlock a membership to access even more top-tier models.

Optimal Translation vs. Traditional Translation

Parallel multi-model translation plus intelligent scoring — move beyond the mechanical errors of a single engine.

AI Optimal Translation

Multi-model parallel: simultaneously uses top-tier models like DeepSeek and GPT
Intelligent scoring & filtering: automatically identifies low-quality translations and recommends the best result
Transparent rationale: every model score and evaluation note is shown, so your choice is evidence-based
Segment-level precision: manually pick the best translation per sentence or paragraph
Free combination: flexibly mix translation and scoring models to match your content type
All in one: optimal selection and verification in a single workflow, dramatically improving long-text translation efficiency

Traditional Translation

Single engine: locked into one traditional translation service — inflexible
No quality check: cannot assess translation quality — errors are hard to catch
Black-box output: only one fixed translation, no way to cross-compare
Whole-text only: outputs as one block — no sentence-level fine-tuning
No adaptation: one-size-fits-all, cannot tailor to different content types
Tedious & slow: requires manually copying and pasting to other platforms for comparison

Why Choose SelectTranslate

Free & Open

Free browser extension, no registration or login required. Install SelectTranslate and start translating right away.

Cross-Device

Bilingual Reading

Web pages display in bilingual parallel view — one click on the extension button to enable bilingual reading.

All Scenarios

Web page, selection, hover and input-box translation — install once, use everywhere.

Higher Quota

Membership unlocks larger translation quotas and more advanced models for heavy workloads.

All Formats

Text, documents, images and PDF translation in one extension — no switching between tools.

What can text translation handle?

SelectTranslate text translation handles all kinds of text content. Here are the most common use cases:

Academic & Research

Academic Abstract Translation
Journal Article Translation
Research Report Translation
Manuscript Translation
Thesis Translation
Dissertation Translation

Business & Office

Business Email Translation
Work Report Translation
Business Document Translation
Contract Clause Translation
Resume Translation
Cover Letter Translation

Travel & Lifestyle

Travel Itinerary Translation
Navigation Guide Translation
Common Phrases Translation
Culture Guide Translation
Travel Brochure Translation
Restaurant Menu Translation

Content & Marketing

Website Content Translation
Blog Post Translation
Marketing Copy Translation
Ad Campaign Translation
Product Description Translation
Social Media Content Translation

SelectTranslate All-Scenario Translation Tools

Beyond text — images, PDFs, video subtitles, and meetings, all translated.

Text Translation

Text translation and Optimal Translation

Document / File Translation

Word, PDF, PPT and other file translation

Image Translation

OCR and translation for images and comics

PDF Translation

PDF translation with layout and formulas preserved

Video Subtitle Translation

Bilingual subtitles for online videos

Meeting Translation

Real-time translation for online meetings

Web Page Translation

Bilingual parallel view via browser extension

Selection / Hover Translation

Translate on selection or hover

Popular Language Pairs

FAQ

Yes. SelectTranslate text translation is completely free, no registration needed. Optimal Translation supports free AI models, and more advanced models are available through membership plans.