Free Alt Text Generators
Which AI alt text generators a startup can write image alt text for its site and store with for free today, how many images the free plan covers, whether it handles one image or many, whether a card is needed and what the first paid plan costs, read from each provider's own page.
Free allowances read on each provider's own pages, all checked on or after . Alt text generators change their free plans from time to time: confirm the terms on the provider's page before you rely on it.
Alt text generators a startup can use for free today include AltText.ai (25 free credits, no card), Ahrefs (Free AI alt text tool), AltTextLab (25 free credits a month), Popupsmart (Completely free to use), and AutoAlt.ai (50 images a month, free forever). Each of the 8 free plans below links to the provider's page that states it, with its main limit, how many images it covers, whether a card is needed and what the first paid plan costs.
Alt text describes an image for people using screen readers and for search engines, and a site or store with hundreds of images rarely has it. AI alt text generators write it for you, some in bulk with free monthly credits, and several companies offer free tools for one image at a time.
The headline rarely tells you how far it goes. Free plans cap images or credits, free tools handle one image at a time, and CMS plugins or extra languages are often kept for paid plans. Each tool below shows what is free, its main limit, how many images it covers, whether a card is needed and what the first paid plan costs, quoted from the provider's own page with the date we read it.
Which tools we picked and the order they appear in are our editorial choices; the terms are the providers'. Some of these providers pay us a referral commission when someone signs up through our link: those links are labeled, and they play no part in which tools are listed or where.
Alt text apps with free credits or a free plan
Generate alt text for many images or a whole site, free to start.
- 1
AltText.ai
Testing alt text on your own images before paying
AltText.ai gives every new account 25 free credits with no credit card, and one credit writes the alt text for one image. Its Bronze plan is $5 a month for 100 credits.
- Images covered
- 25 images, one credit each (source: alttext.ai)
- Payment card
- No credit card required (source: alttext.ai)
- First paid plan
- Bronze: $5 a month, 100 credits (source: alttext.ai)
Start free at AltText.aiReferral linkTerms read on alttext.ai on AltText.ai: the free allowance and how to start - 2
AltTextLab
Small sites that need alt text every month
AltTextLab's free plan gives 25 credits every month with no credit card, and one credit is one image. Its Pro plan is $5 a month for 100 credits.
- Images covered
- 25 images a month (source: alttextlab.com)
- Payment card
- No credit card required (source: alttextlab.com)
- First paid plan
- Pro: $5 a month, 100 credits (source: alttextlab.com)
Start free at AltTextLabTerms read on alttextlab.com on AltTextLab: the free allowance and how to start - 3
AutoAlt.ai
Ongoing alt text for a small site, 50 images a month
AutoAlt.ai's Freemium plan covers 50 images a month with no credit card required, and one image uses one credit. Plans are priced in euros on its page.
- Main limit
- 1 image = 1 credit (source: autoalt.ai)
- Images covered
- 50 images a month (source: autoalt.ai)
- Payment card
- No credit card required (source: autoalt.ai)
Free alt text tools for one image at a time
Upload an image and get alt text, free.
- 1
Ahrefs
Writing alt text for a single image
Ahrefs' free AI Image Alt Text Generator accepts JPG, PNG and GIF files less than 10MB, on its own page at ahrefs.com.
- What's free
- Free AI alt text tool (source: ahrefs.com)
- 2
Popupsmart
Quick alt text for one uploaded image
Popupsmart's AI alt text generator analyzes an image and writes a descriptive alt text. Its FAQ says the generator is completely free to use.
Start free at PopupsmartTerms read on popupsmart.com on Popupsmart: the free allowance and how to start - 3
Poper
Several alt text suggestions for one image
Poper's Image Alt Text Generator is free to use, with a limit of 10 free requests per day. Each use consumes 4 AI credits, according to the upload box on the page.
- 4
Quattr
Alt text alongside other free SEO tools
Quattr's free image alt text generator has a usage cap, and its Lite plan is $9.99 USD a month for 20 daily credits on the same page.
- 5
Azure AI Vision
Developers who want captions through an API
Azure AI Vision's free tier gives 5,000 transactions a month across all Image Analysis features, with 20 transactions per minute.
Start free at MicrosoftTerms read on azure.microsoft.com on Azure AI Vision: the free allowance and how to start
Also useful for design and creative work
Referral links, picked for fit and ordered by fit (70%) and what a signup earns us (30%), at no cost to you. They never change this page's ranking.
Compare the top options
How this comparison is built
The list covers AI alt text generators a founder can use for free today without applying to a program. The order and the "best for" notes are our editorial reading of each tool's terms. Every term comes from the tool's own pricing or help page on the date shown, never from a third-party list; follow each link for the full conditions. A cap on images or credits, one image at a time instead of bulk, CMS plugins or languages kept for paid plans can matter more than the headline, so the comparison quotes them wherever the provider states them. Some of these tools pay StartupPerks a referral commission, and their links are labeled as referral links; that decides neither whether nor where a tool appears, and no tool pays for a placement on this page.
Read the full methodologyCommon questions
What is the best free alt text generator?
By the terms each provider states, AutoAlt.ai covers 50 images a month free forever, AltTextLab 25 free credits a month, AltText.ai 25 free credits in total, and Ahrefs, Popupsmart and Quattr have free single-image tools.
Can I generate alt text in bulk for free?
In small amounts: AutoAlt.ai covers 50 images a month and AltTextLab 25 a month, at one credit per image, and AltText.ai gives 25 free credits in total.
Is AltText.ai free?
AltText.ai gives 25 free credits with no credit card required, one credit per image. Bronze is $5 a month for 100 credits.
Is there a free alt text API?
Azure AI Vision's free tier includes 5,000 transactions a month with all features, at 20 transactions per minute.
More best-of guides
New startup perks, in your inbox
Get an email when a new credit, discount, or deal for founders is added. No spam, unsubscribe anytime.