
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.

LightPDF records 1,742,568 monthly visits with -15.3% month-over-month growth and Freemium pricing. WhatLetter records 310 monthly visits with +9.9% growth and Freemium pricing.
Snap a document, translate it, and talk it through in your own language
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | lightpdf.com | whatletter.com |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 1.74M (1,742,568) | 310 (310) |
| MoM Traffic Delta |
| -314.58K (-15.3%) |
| +28 (+9.9%) |
| Primary Market & Share | 🇮🇳 India (24.9%) | 🇨🇴 Colombia (83.7%) |
|---|
| Direct Visits / mo | 442.07K | 129 |
|---|
| User Rating | 4.2 | 4 |
|---|
| Supported Platforms | Website | Website |
|---|

Free AI-powered PDF editor, converter and reader for every device
Upload a PDF and ask questions in natural language, follow up on details and see which passages the answers came from. A separate chat mode works with YouTube videos.
Translate whole documents, including scanned and image-based PDFs, into 20+ languages while keeping the original formatting and layout intact.
Convert invoices, receipts, bank statements and purchase orders into structured, editable Excel files automatically.
Edit text and images, OCR scanned pages, convert to and from Office formats, then merge, split, compress, watermark, sign and annotate.
Snap a document, translate it, and talk it through in your own language
Point your phone or webcam at a menu, bill, prescription or letter and WhatLetter reads the text off the image and prepares it for translation.
Pick one of 30+ supported languages, including Arabic, Bengali, Mandarin, Farsi, Hindi, Korean, Spanish, Tagalog, Urdu and Vietnamese, and read the paperwork in the language you think in.
After translating, you keep chatting with the assistant to ask what a term means, what a date implies, or what you are being asked to sign.
Long and technical material, from insurance paperwork to academic or financial reports, gets condensed into a summary you can actually finish reading.

SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.

SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.

SpecialistEnterprise-grade neural machine translation, AI writing refinement, and real-time voice translation across thirty-plus global languages.
#3Free online OCR that turns any image into editable text in seconds
Offers a completely free PDF editing and AI assistant experience, but lacks some of LightPDF's cloud-native collaboration features.
Offers a robust desktop suite for OCR and editing, but requires software installation unlike cloud platforms.
AI translation for text, images, documents and speech in 100+ languages

Provides quick browser-based PDF editing and e-signatures, but has a less advanced conversational AI assistant.

Provides a more polished cross-platform desktop PDF editing suite, but requires a paid upgrade for full AI features.
Offers a streamlined conversational interface for querying PDFs, but provides fewer document editing and conversion utilities.

One AI super app for chat, images, video and everyday document tasks

Translate, summarize, and understand documents in 154 languages without losing the layout
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
SpecialistEnterprise-grade neural machine translation, AI writing refinement, and real-time voice translation across thirty-plus global languages.
Free online OCR that turns any image into editable text in seconds
Offers a robust desktop suite for OCR and editing, but requires software installation unlike cloud platforms.
AI translation for text, images, documents and speech in 100+ languages
Provides quick browser-based PDF editing and e-signatures, but has a less advanced conversational AI assistant.
One AI super app for chat, images, video and everyday document tasks
Translate, summarize, and understand documents in 154 languages without losing the layout