Amazon Seller Tools
5 free browser-based utilities for Amazon sellers. Clean your listing titles, optimize backend search terms, format bullet points, build variation matrices, and map supplier CSVs to Amazon flat file columns — all without uploading your data anywhere.
Listing Title Cleaner
Strip hidden Unicode characters, collapse extra whitespace, remove duplicate words, clean messy punctuation, and optionally apply smart title case. Shows character count against the 200-character limit.
Search Terms Cleaner
Lowercase everything, remove punctuation, strip hidden characters, and deduplicate words — all while tracking the exact byte count against Amazon's 250-byte backend keyword limit.
Bullet Point Formatter
Paste raw bullet content from supplier sheets or competitor listings. This tool parses, cleans, and restructures bullets with optional CAPS lead-ins and per-bullet character counts.
Variation Builder
Define variation attributes (size, color, pack count) and generate every parent/child combination. Preview the full matrix in a table, then copy to clipboard or download as CSV.
Supplier CSV to Amazon Column Mapper
Upload or paste a supplier CSV, map each column to Amazon flat file fields using a preset dropdown, preview the first 10 rows, and download the transformed output. 100% browser-side.
Recommended Workflow: New Listing Setup
These tools are designed to work together. Here's the optimal order for preparing a new Amazon listing from raw supplier data:
- Map your supplier CSV using the Column Mapper to align supplier columns with Amazon's flat file fields.
- Clean your product title with the Title Cleaner — strip hidden characters, fix spacing, and verify you're under 200 characters.
- Format your bullet points using the Bullet Formatter — normalize formatting, add CAPS lead-ins, and check per-bullet character limits.
- Optimize backend keywords with the Search Terms Cleaner — deduplicate, strip punctuation, and stay within 250 bytes.
- Build your variations using the Variation Builder — generate the full combination matrix and export for your flat file.
Why We Built These Tools
Most Amazon listing preparation happens in spreadsheets — copying from supplier catalogs, pasting into flat file templates, manually checking character limits. Each step introduces formatting errors: hidden Unicode characters from PDFs, duplicate words from copy-paste, punctuation that wastes bytes in search terms, and variation matrices that are tedious to build by hand.
These tools automate the mechanical parts of listing preparation so you can focus on the strategic work — choosing the right keywords, writing compelling bullets, and pricing competitively. Every tool runs in your browser with no server dependency, which means your product data and supplier information stay private.
Amazon Listing Optimization Quick Reference
Product Title
200 characters (varies by category)
Brand + Product Type + Key Feature + Size/Color. No ALL CAPS.
Bullet Points
5 bullets, 500 chars each
CAPS LEAD-IN: supporting detail. Front-load benefits and keywords.
Backend Search Terms
250 bytes
Lowercase, no punctuation, no duplicates, no brand names.
Variations
2-3 attributes per category
Size/Color is most common. All children share reviews.
Frequently Asked Questions
Are these tools free to use?
Yes — all 5 tools are completely free with no sign-up, no email capture, and no usage limits. Use them as often as you need.
Is my data safe?
Every tool runs 100% in your browser. No data is uploaded to any server, stored in any database, or transmitted anywhere. Your supplier CSVs, product titles, and keywords stay on your machine.
Do I need a Seller Central account?
No. These tools work with raw text and CSV data — no Amazon API connection or Seller Central login is needed. You can use them to prepare listing content before you even have an active listing.
How are these different from the Amazon FBA Calculators?
The FBA Calculators focus on financial analysis — profit margins, fees, ROI, and pricing strategy. These Seller Tools focus on listing content preparation — cleaning titles, optimizing keywords, formatting bullets, building variations, and mapping supplier data.
Can I use these tools for other marketplaces?
The Title Cleaner, Bullet Formatter, and CSV Mapper work with any text or CSV data, so they're useful for Walmart, eBay, or Shopify listings too. The Search Terms Cleaner and Variation Builder are specifically designed around Amazon's rules and limits.
Amazon FBA Calculators
Once your listings are optimized, use our FBA calculators to analyze profitability: