LightPDF

lightpdf.com ↗

AI-powered PDF editor, converter and reader for web, mobile and desktop

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SI Score: 74/100
Pricing: Freemium
Free plan: Yes
Sign-up required: Not confirmed

AI Chat OCR E-Signature Web App PDF Editing PDF Conversion iOS Android

Ask SI about LightPDF

Answers use saved listing facts and recorded sources.

Homepage screenshot

SI REVIEWBased on the site's own pages, in a directory managed by people

What it does

LightPDF is an AI-powered PDF toolkit for editing, converting, annotating, signing, organizing and chatting with documents. It includes AI features such as chat, generation, translation, image processing and data extraction. It is available on Web, Mobile and Desktop.

LightPDF is a PDF toolkit that covers editing, converting, annotating, signing, organizing and chatting with documents. It also includes AI features such as chat, generation, translation, image processing and data extraction. The pricing page lists a free plan at $0, monthly at $5.99 per month, yearly at $15.99 per year, and lifetime at $39.99 one-time. The free plan is web only and has a 10MB maximum file size. Paid plans support Web, Mobile and Desktop with unlimited file size. AI features use credits, and the free plan includes 1000 credits per month. The pricing page mentions a 30-day money back guarantee and 24/7 customer service. No API or open source information is provided on the homepage or pricing page.

Strengths

AI-powered PDF editing, conversion, signing and OCR
Available on Web, Mobile and Desktop
Free plan available with 1000 AI credits per month

Watch out for

Free plan is web only and caps files at 10MB
AI features use credits that may run out
No API or open source information provided

Best for

StudentsFreelancersSmall teamsOffice workers

SI Score

74/100

#190 in Business & Productivity

Based on published information. No hands-on task test.

Method 2.0 · Earlier source review Assessed Oct 15, 2026Score ceiling for this evidence: 74/100.

Product usefulness 74

Evidence

Original usefulness rating: 85/100. The published score is limited to 74/100 by the evidence ceiling.

LightPDF is a practical AI-powered PDF toolkit with clear pricing and platform support, useful for document workflows.

Limits: An AI judgement, not a measurement. An editor can override it.

Source links and check dates are in Sources and checks below.

Separate website checks

These checks do not add points to the SI Score. They inspect the website's HTML, not the product in use.

Basic website checks60/100

HTTPS: yes
Homepage answered with HTTP 200
Privacy policy link: not found
Terms link: not found
Contact or about page: not found

We check that these pages exist, not what they say. Ownership and company details are not verified.

Checked Oct 15, 2026.

HTML accessibility checks100/100

Page language set: en
Mobile viewport: yes
Images with a text alternative: 11 of 11
Main heading (h1): yes

Automated checks on the homepage HTML only. This is not a full accessibility audit.

Checked Oct 15, 2026.

Homepage HTML response100/100

First byte after 467 ms
Homepage HTML loaded in 0.5 s
HTML size 135 KB

Measured once from our server. Images, scripts and your own connection are not included.

Checked Oct 15, 2026.

Trackers in homepage HTML88/100

Third-party trackers in the homepage code: Google Tag Manager

Only the homepage HTML is checked. Trackers loaded later by scripts, and what the service does with your data, are not covered.

Checked Oct 15, 2026.

Page date hints100/100

Server says last modified: Wed, 14 Oct 2026 03:46:13 GMT

A copyright year is a weak sign of upkeep. It does not prove the content is current.

Checked Oct 15, 2026.

Policy links do not verify a company's conduct. An HTML response time is not application speed. Tracker and accessibility checks miss behavior after page load. Copyright dates do not prove product upkeep.

How the SI Score works →

Unconfirmed details may be unassessed, absent from the pages checked or temporarily unreadable. A missing price does not mean the service is free.

Sources and checks

Supporting pages for product usefulness, site facts, prices and separate website checks. Each record keeps its own date. Reading a page does not establish how well the product performs in use.

lightpdf.com/pricing
- PricingSeen on the siteChecked Oct 15, 2026
  Free Plan$0 Sign Up Free
- Free planSeen on the siteChecked Oct 15, 2026
  Free Plan$0 Sign Up Free
- PlatformsSeen on the siteChecked Oct 15, 2026
  Web / Mobile / Desktop
- Product usefulness evidenceChecked Oct 15, 2026
lightpdf.com/
- Product usefulness evidenceChecked Oct 15, 2026
- Basic website checks (separate check)Checked Oct 15, 2026
- HTML accessibility checks (separate check)Checked Oct 15, 2026
- Homepage HTML response (separate check)Checked Oct 15, 2026
- Trackers in homepage HTML (separate check)Checked Oct 15, 2026
- Page date hints (separate check)Checked Oct 15, 2026

Checks without a source link

Sign-up requiredUnknownChecked Oct 15, 2026
APIUnknownChecked Oct 15, 2026
Open sourceUnknownChecked Oct 15, 2026

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