Software Alternatives & Startups

AltTextify VS KeptPDF

Compare AltTextify VS KeptPDF and see what are their differences

AltTextify logo AltTextify

#1 AI-powered alt text generator built to boost SEO and ensure ADA/WCAG accessibility compliance.

KeptPDF logo KeptPDF

Redact, edit, OCR, and sign PDFs entirely in your browser. The file never leaves your device. Free, no account needed.
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  • AltTextify AltTextify Website
    AltTextify Website //
    2025-06-09
  • AltTextify
    Image date //
    2025-06-09
  • AltTextify
    Image date //
    2025-06-09
  • AltTextify
    Image date //
    2025-06-09
  • AltTextify AltTextify Firefox extension - Alt Text Generation, just a right click away
    AltTextify Firefox extension - Alt Text Generation, just a right click away //
    2025-06-09
  • AltTextify AltTextify - Zapier Integrations
    AltTextify - Zapier Integrations //
    2025-06-09

AltTextify is an AI-powered platform that automatically generates SEO-friendly and ADA-compliant alt text for images. Designed for websites, eCommerce stores, and content publishers, it supports 140+ languages and integrates seamlessly with Shopify, WordPress, Webflow, Zapier, and more. Using advanced computer vision and natural language processing, AltTextify analyzes image content and metadata to create context-aware, keyword-rich descriptions that meet ADA, WCAG 2.1, and Section 508 standards. It offers bulk alt text generation, multilingual support, and broad image format compatibility (JPG, PNG, WebP, SVG, AVIF). With automatic alt text insertion, WooCommerce SEO enhancements, and a code-free browser extension, AltTextify saves hours of manual work while boosting accessibility and search engine visibility. Start with a free trial—no credit card required—and experience effortless image optimization at scale.

  • KeptPDF Landing page
    Landing page //
    2026-08-22

KeptPDF is a PDF toolkit that runs entirely in your browser. Nothing uploads: every tool runs on your own device, so the document never touches a server.

What it does:

  • Redaction that auto-detects names, SSNs, phone numbers, addresses, and dates, then removes the underlying text instead of drawing a box over it. Every redacted file gets an audit certificate that anyone can verify.
  • OCR that makes scanned PDFs searchable, with on-device processing.
  • Sign, annotate, compare, organize, split, merge, compress, convert, watermark, Bates numbering, exhibit stamps, and more. About 25 tools in total.
  • A command line version runs the same redaction engine on your own servers for bulk work: scanning bureaus, litigation support teams, and records departments process thousands of PDFs in one pass.

Who it is for: law firms, accounting practices, clinics, and anyone who shares documents they cannot afford to leak.

The core tools are free with no sign-up. Works offline as an installable app.

AltTextify

$ Details
paid Free Trial $5 / Monthly (175 credits per month (3¢ Per Image))
Platforms
Zapier Shopify WooCommerce Wordpress Pabbly Make Google Chrome Firefox Edge Web REST API MCP Server Pipedream MCP
Release Date
2024 April

KeptPDF

$ Details
freemium $29 / Monthly (Pro, 1 user)
Platforms
-
Release Date
2026 May
Startup details
Country
United States
State
Tennessee
Founder(s)
John Whitworth

AltTextify features and specs

  • 🖼️ Automatic Alt Text Insertion
    Every newly uploaded image is instantly analyzed using AI, and descriptive alt text is automatically applied to enhance accessibility and image SEO.
  • 📁 Broad Format Compatibility
    Seamlessly supports all major image formats — including JPG, PNG, WebP, SVG, and AVIF — ensuring consistent performance across modern websites and e-commerce platforms
  • 🛒 SEO-Enhanced for Ecommerce
    AltTextify intelligently incorporates product titles into alt text to boost search engine visibility and product discoverability.
  • 🌍 Multilingual Support
    Generate alt text in over 140 languages, enabling global accessibility, localization, and compliance with international content standards.
  • ♿ Accessibility Compliance
    Meet critical accessibility guidelines including ADA, WCAG 2.1, and Section 508 with auto-generated alt text designed to be both meaningful and compliant.
  • 📦 Bulk Alt Text Generation:
    Quickly update your entire media library using our Bulk Generate tool or WordPress media bulk action menu — ideal for existing image collections.
  • 🆓 Instant Free Trial – No Credit Card Required
    Get started instantly with our free trial. No payment details needed. Experience the full power of AltTextify without commitment.

KeptPDF features and specs

  • Simple PDF Editing
    KeptPDF offers straightforward tools for editing, merging, splitting, and converting PDF files, making it accessible for users who need quick document management without a steep learning curve.
  • Web-Based Accessibility
    Being a web-based tool, KeptPDF can be accessed from any device with an internet connection, eliminating the need for software installation and allowing use across different operating systems.
  • Multiple File Format Support
    The platform supports conversion between PDF and various other file formats, offering flexibility for users who work with documents in different formats.
  • No Installation Required
    Since it operates in a browser, users can save storage space on their devices and avoid compatibility issues that sometimes arise with desktop software installations.
  • Quick Processing
    KeptPDF is designed to process PDF tasks efficiently, allowing users to complete common document tasks like compression or conversion in a relatively short amount of time.

Analysis of AltTextify

Overall verdict

  • AltTextify is a useful tool for automatically generating alt text descriptions for images, helping improve web accessibility and SEO with minimal manual effort.

Why this product is good

  • Automates the creation of descriptive alt text, saving time compared to writing descriptions manually
  • Improves web accessibility for visually impaired users who rely on screen readers
  • Can boost SEO by providing search engines with descriptive image metadata
  • Helps ensure compliance with accessibility standards like WCAG and ADA
  • Streamlines workflow for websites and content platforms with large numbers of images

Recommended for

  • Web developers and designers looking to improve site accessibility
  • Content creators and bloggers managing image-heavy websites
  • E-commerce businesses with large product image catalogs
  • SEO specialists aiming to optimize image metadata
  • Organizations needing to meet accessibility compliance requirements

AltTextify videos

Making Your Website ADA Compliant With Alt Text: AltTextify.net

KeptPDF videos

No KeptPDF videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to AltTextify and KeptPDF)
SEO
100 100%
0% 0
PDF Readers And Editors
0 0%
100% 100
SEO Tools
100 100%
0% 0
PDF Tools
0 0%
100% 100

Questions & Answers

As answered by people managing AltTextify and KeptPDF.

What makes your product unique?

AltTextify's answer

AltTextify combines powerful AI with a deep understanding of SEO and accessibility standards to generate alt text that isn’t just technically correct — it’s contextually smart. With native support for 140+ languages, automatic insertion via browser extension, and integrations with platforms like Shopify and WordPress, AltTextify doesn’t just generate alt text — it gets your content. Think of it as your site's multilingual, ADA-savvy image whisperer.

KeptPDF's answer:

KeptPDF runs entirely in your browser. Your file, and the text inside it, never leaves your device. Not to an AI, not even to us. You can open your browser's network tab and watch: the document bytes never go out.

Most online PDF tools upload your file to a server first, and some "AI redaction" services quietly send your document text to a third-party model. That is the exact risk people are trying to avoid when they redact something.

KeptPDF also does true redaction. The text is removed from the file, not covered with a black box you can copy out later. Every redaction produces a verification certificate you can share with the file.

Why should a person choose your product over its competitors?

AltTextify's answer

AltTextify offers the same — and often better — AI-powered image alt text generation as leading platforms, but at a fraction of the cost. While competitors charge high monthly premiums for accessibility and SEO compliance, AltTextify is built to be 50% more economical without compromising on quality.

With seamless integrations across platforms like Shopify, Webflow, WordPress, and Zapier, AltTextify delivers enterprise-grade automation for startups, freelancers, and agencies — all at a price that actually makes sense.

If you're looking for an affordable, scalable solution that keeps your images compliant and optimized, AltTextify is the smart choice.

KeptPDF's answer:

Three reasons.

Privacy you can verify, not just a promise. Processing happens locally in the browser, so there is no upload step to trust. We do send anonymous usage counts for quota, and we say so plainly, but never your document.

Real redaction with proof. Removed text is permanently gone, and you get a certificate showing the file was checked for leftover extractable text. Automated detection cannot catch everything, so a final human review is still your job, and the tool says that too.

It works on a phone. Most PDF suites assume a desktop. KeptPDF was built and used on a phone first, so redacting a document while you are standing in a hallway actually works.

How would you describe the primary audience of your product?

AltTextify's answer

AltTextify is designed for creators, builders, and brands who care about both search visibility and accessibility — without wasting hours on manual alt text writing. Our audience includes eCommerce store owners, content publishers, digital marketers, agencies, and developers — but also a growing wave of no-code enthusiasts using platforms like Zapier, Webflow, and WordPress to build high-performing websites without touching code.

Whether you're managing thousands of product images or publishing weekly blog content, AltTextify fits seamlessly into your workflow to make every image optimized, compliant, and search-ready. If you're automating everything else, why not your alt text too?

KeptPDF's answer:

Anyone who has to hand a document to someone else and needs the sensitive parts gone first.

In practice that is solo attorneys and small law firms, accountants and tax preparers, healthcare and records staff handling requests, HR teams, and individuals dealing with their own medical, legal, or financial paperwork.

The common thread is not an industry. It is a person who cannot upload a confidential file to a random website, and who does not have an enterprise IT budget to solve it.

What's the story behind your product?

AltTextify's answer

AltTextify was born out of a very relatable problem: writing alt text is nobody’s favorite task. It’s repetitive, boring, and easy to skip — but also super important for SEO and accessibility. After tagging hundreds of images manually (and maybe shedding a few tears over alt="" blanks), we thought: There has to be a smarter way.

So we built one.

AltTextify started as a weekend side project by a developer who hated seeing good images go unnoticed by search engines and screen readers. With a bit of AI magic, some computer vision, and a deep respect for web standards, we created a tool that could automatically describe images — better, faster, and in 140+ languages.

Now, AltTextify helps creators, marketers, and developers make their websites more inclusive and discoverable, without lifting a finger (okay, maybe one finger — to click “Generate”).

KeptPDF's answer:

A family member got seriously ill. We spent most days at the hospital, and straight answers were hard to come by, so we leaned on AI tools to make sense of the records, notes, and lab results.

But you cannot paste a medical record into an AI chat. You have to strip the names, the ID numbers, the diagnoses first. And almost every tool we found either wanted to upload the whole file to a server, or "auto-redacted" by sending the document text to an online AI. That was the exact thing we were trying to avoid.

Most of this was happening on a phone, at a bedside. So I built the tool I needed: redaction that runs on the device, works on mobile, and never sends the file anywhere. That turned into KeptPDF, which is now a full PDF suite with over 20 tools, all local-first.

Which are the primary technologies used for building your product?

AltTextify's answer

AltTextify runs on a stack of modern AI magic — think computer vision models, natural language generation, and intelligent tagging algorithms. Under the hood, we use Python (for ML models), Node.js (for APIs), and a sprinkle of Chrome Extension wizardry. We integrate easily with platforms through REST APIs, Zapier, WordPress plugins, and browser-side enhancements.

KeptPDF's answer:

The app is plain JavaScript with no front-end framework, which keeps it fast and keeps the code auditable.

PDF work happens in the browser using pdf.js for rendering and pdf-lib for writing. Text recognition uses Tesseract running as WebAssembly. Password and encryption handling uses a WebAssembly build of qpdf. It is a Progressive Web App, so it installs and works offline.

The thin server side is Node on Vercel, with Postgres for accounts, Stripe for billing, and Resend for email. None of those ever see a document.

Who are some of the biggest customers of your product?

AltTextify's answer

Our growing customer base includes Shopify stores, global bloggers, and marketing agencies who manage massive content libraries. While we can't name-drop just yet (NDA life 😅), we’re proud to power accessibility and SEO workflows for brands in eCommerce, digital publishing, and SaaS — with image libraries ranging from dozens to tens of thousands.

KeptPDF's answer:

KeptPDF is early and independent, and we do not publish customer names. The product is privacy-first by design: we never see your documents, and we do not track who our users are or what they work on. Publishing a client list would sit badly next to that.

The user base today is mostly solo attorneys, small firms, accountants, and individuals handling their own records.

User comments

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What are some alternatives?

When comparing AltTextify and KeptPDF, you can also consider the following products

AltText.ai - The #1 Alt Text Generator - Improve SEO & site accessibility

Smallpdf - PDF document management and conversion suite

Alt Text AI Generator - Generate Alt Text for Images using AI. Check out our integrations for WordPress, Shopify, WooCommerce, Chrome, Firefox. Improve your SEO and accessibility to rank faster on Google.

iLovePDF - Premium online PDF tool set

AltTextLab - Generate alt text for images automatically with our AI-powered alt text generator. Boost accessibility and SEO with Alt Text Lab – try it today.

Sejda - Split, merge and other powerful PDF tools.