Best Free Amazon Seller Tools in 2026 (By Job)

The best free Amazon seller tools in 2026 start with what Amazon already gives you: Product Opportunity Explorer for product research, the Revenue Calculator for fees and margins, and Brand Analytics for keyword data if your brand is registered. Around that core, a handful of free extensions and browser tools (Keepa for price history, free sales estimators, image and listing checkers) cover most of what a new or small seller needs before paying for anything.

This guide is organised by job, with the free option worth starting with, what it does, and where the free version runs out.

A quick disclosure: this post is published by zonfy, and a few of the tools listed in the listing, image and A+ sections are zonfy's own free tools. They are included because they do the job, and they sit alongside other options rather than replacing them. We have tried to be fair about where third-party and Amazon-native tools are the better pick.

Free Amazon seller tools at a glance

Free limits change often, especially for third-party freemium tools, so check current free limits on their sites.

1. Product research and demand

Amazon Product Opportunity Explorer

If you only use one free Amazon product research tool, make it this one. Product Opportunity Explorer lives inside Seller Central (look under the Growth menu) and groups search terms and products into niches. For each niche it shows search volume trends, the top clicked products, and signals such as return rates and how many products dominate clicks.

What makes it valuable is the source: the data comes from Amazon itself rather than from a third-party estimate. The limits are that it works at the niche level, it is only available to sellers with a Seller Central account in supported marketplaces, and it does not give you the per-ASIN sales history that paid research tools offer.

How to use it well:

• Start with a broad search term for a category you understand.
• Open the niche and look at the search volume trend over the past year, not just the current figure.
• Check how concentrated clicks are among the top products. Very high concentration usually means a hard niche to break into.
• Read the customer review insights where available, which surface what buyers complain about. Those complaints are your product and listing angles.

Brand Analytics (if you are eligible)

Brand Analytics is free for brand owners enrolled in Amazon Brand Registry. Its reports show which search terms drive traffic in your category, how your brand performs in search, and what customers buy alongside your products. For research, the Top Search Terms view is especially useful for spotting rising demand. We cover each report in detail in our Brand Analytics reports guide.

If you are not yet brand-registered, you will not see Brand Analytics at all.

Amazon's own public pages

Best Sellers, New Releases and Movers and Shakers pages are free, need no account and update frequently. They will not give you numbers, but scanning them by subcategory is a fast way to spot products gaining momentum before you dig deeper with other tools.

2. Sales and fee estimates

Amazon Revenue Calculator

Before you fall in love with a product, run it through Amazon's free Revenue Calculator (often called the FBA calculator). You enter an ASIN or product dimensions and a price, and it estimates referral fees, fulfilment fees and your net proceeds for FBA versus fulfilling the order yourself.

Many products that look great on demand fall apart once fees are subtracted. The calculator will not include your ad spend, returns or inbound shipping, so add those in a spreadsheet afterwards.

Free sales estimators

A free Amazon sales estimator turns a product's Best Sellers Rank and category into an estimated number of monthly sales. Several research tool companies offer one, including:

• AMZScout offers a free sales estimator page and a browser extension with limited free use.
• Jungle Scout has a free sales estimator on its website alongside its paid research suite.
• Helium 10 offers free access to some features through its browser extension and free plan.

All three are freemium, which means the free version exists to show you what the paid product does. Free limits, number of daily lookups and which features are included change regularly, so check current free limits on their sites before building a workflow around one.

A practical caution: every estimator uses its own model, and two tools can give quite different numbers for the same ASIN. Use estimates to compare products relative to each other and to rule things out, not as a precise forecast.

3. Keyword research

If you are searching for the best free Amazon keyword research tool, the honest answer is that the best free data comes from Amazon itself, and third-party free tiers fill in gaps.

Amazon search autocomplete

Type your main product term into the Amazon search bar and note every suggestion. Then add a letter after the term (a, b, c and so on) and repeat. Autocomplete reflects what shoppers actually type, and it costs nothing. It is slow, but for a single product it often surfaces long-tail phrases that paid tools miss or bury.

Amazon Ads keyword suggestions

When you build a Sponsored Products campaign, the campaign manager suggests keywords for your ASIN and shows suggested bids. You do not have to launch the campaign to see the suggestions. Bid levels are a rough signal of how competitive a term is.

Brand Analytics Search Query Performance

For brand-registered sellers, the Search Query Performance report shows the search terms that led shoppers to your products, along with impressions, clicks, add-to-carts and purchases at each step. That is first-party funnel data no free third-party tool can match.

Free tiers and extensions

Helium 10, Jungle Scout, AMZScout and similar tools each offer some free keyword functionality, usually a capped number of searches or a limited view inside a browser extension. Reverse ASIN lookups (seeing which keywords a competitor ranks for) are among the most useful features and are usually part of paid plans. Our reverse ASIN keyword research guide walks through how to get value from it, including what you can do with free data alone.

Once you have keywords, the next job is placing them well. Title, bullets and backend search terms each index differently, which is covered in our backend search terms guide.

4. Price history

Keepa's free browser extension

Keepa is the standard free tool for Amazon price history. Install the browser extension and a chart appears on Amazon product pages showing how the price, and often the sales rank, has moved over time.

For sellers this answers questions such as: does this product sell steadily or only during sales events, do competitors race to the bottom on price, and how did rank react to past price changes. Some advanced data, charts and alerts sit behind Keepa's paid subscription, so check what the free version currently includes on their site.

5. Listing optimisation

Free listing tools mostly do one thing well: check your listing against rules and best practices so you can fix it yourself. Very few free tools will write a strong listing for you.

Amazon's own guidance

Seller Central flags listing issues and suppressed listings, and Amazon publishes category style guides with title length limits, banned terms and formatting rules. These are free, authoritative and worth reading once for your category. Our list of prohibited words in Amazon listings is a quick companion.

zonfy Amazon Listing and Title Analyzer

The Amazon Listing and Title Analyzer scores your title, bullets, description and search terms against Amazon listing guidelines and gives specific fixes. Paste your existing copy and it flags issues such as titles that run too long, repeated words, promotional claims and weak bullet structure. It is free and needs no signup.

It works well as the first pass of a listing review. For a full audit covering images, reviews and pricing as well, follow our Amazon listing audit checklist.

Manage Your Experiments

If you are brand-registered and your listing gets enough traffic, Manage Your Experiments lets you A/B test titles, main images, bullets and A+ Content for free inside Seller Central. It is the only way to prove which version actually sells better on your own listing rather than guessing.

6. Product images

Images cause more listing suppressions and lost clicks than almost anything else, and this is where free tools are surprisingly capable. The following zonfy tools are free, run without signup, and each handles one specific image job.

• Amazon Image Compliance Checker checks whether your main image is likely to pass Amazon: white background, around 85 percent product fill, resolution, and the presence of text or logos. Run every main image through it before upload.
• Amazon Image Fixer resizes to 1000, 1600 or 2000 px, pads to square, forces a pure-white background and exports an Amazon-ready file.
• Product Background Remover removes the background from a product photo and gives you a clean white or transparent image, which is the most common fix for main images shot at home.
• Product Image Upscaler upscales a low-resolution product photo so Amazon's zoom works. Zoom generally needs a long side of at least 1000 px, and larger is better.
• Bulk Amazon Image Processor resizes, squares and white-backgrounds a whole folder of product images and downloads them as one ZIP, which saves real time when you manage many SKUs.

Other free options are worth knowing too. Canva's free plan is fine for simple infographic gallery images, and most phone photo editors can crop and brighten a shot. Where free tools run out is creating new images: lifestyle scenes, infographics designed around your selling points, and consistent styling across the gallery generally take a designer, a photographer or a paid tool.

For what to put in each gallery slot, see our product gallery images strategy, and for the exact main image rules, our main image requirements guide.

7. A+ Content

Amazon A+ Content Manager

The A+ Content Manager in Seller Central is free for brand-registered sellers. It is where you choose modules, upload images and write the text, and Amazon reviews the result before it goes live. There is no charge for publishing Basic A+ Content.

The catch is that each module has its own image dimensions, and the editor will reject or awkwardly crop images that do not match.

zonfy A+ Content Image Size Tool

The A+ Content Image Size Tool lists the exact dimensions for every A+ module and lets you crop or pad your image to fit. It is free and saves a lot of trial and error inside the A+ editor. For the full specification table, see A+ Content image sizes and specifications.

When free stops being enough

Free tools can size and check your A+ images, but they cannot design the modules or write the copy for you. Your options at that point are to design them yourself, hire a designer or agency, or use a paid generator. We compared the main paid options honestly in best Amazon A+ Content generators in 2026. zonfy's own generator, which builds A+ Content, a full listing, gallery images and a product video from an Amazon link or product photos, is one of them; it is a paid subscription from ₹749 per month, not a free tool.

A free tool stack for a new seller

If you are starting from zero and want to spend nothing until you have a product selling, this combination covers the core jobs:

• Find demand with Product Opportunity Explorer and the Best Sellers pages.
• Check margins with Amazon's Revenue Calculator, then add ad spend and returns in a spreadsheet.
• Sanity-check sales with one free sales estimator, compared across a few competing ASINs.
• Check price stability with Keepa's free extension on the top competitors.
• Collect keywords from autocomplete and Amazon Ads suggestions.
• Fix your images with the free image checker, background remover and image fixer.
• Review your copy with the free listing analyzer and your category style guide.
• Register your brand as soon as you can, which unlocks Brand Analytics, A+ Content and Manage Your Experiments at no extra cost.

When to start paying for tools

Free tools are enough to launch. They become a bottleneck at three points:

• When you are researching many products a week. Daily caps on free estimators and keyword lookups slow you down, and paid research suites start to earn their cost.
• When competitors' keyword data matters. Reverse ASIN and keyword tracking at scale are mostly paid features.
• When content production is the limit. Once you have several products, writing listings and designing images and A+ modules for each becomes the main time cost. That is the point where a paid content tool or agency usually pays for itself. Our breakdown of listing costs for agencies versus AI tools helps you compare.

Until you hit one of those points, the best Amazon seller tools are the free ones you actually use every week. Start with Amazon's own tools, add Keepa and one estimator, and keep the free image and listing checkers bookmarked at zonfy.app/tools for every new listing.