kelboro

Index

Everything Kelboro makes

For resellers

  • N°05

    Kelboro Reseller Tracker

    Paid spreadsheet, coming soon. Not built yet and not for sale. Planned, not final: an inventory log, a mileage log, a tax summary with a set-aside at a % you choose, and a dashboard by platform.

    Join the Tracker waitlist by email
    Coming soon
  • N°01

    Reseller Fee Calculator 2026

    Fees, payout, net profit and margin for one sale on eBay, Poshmark, Mercari, Depop and Etsy, and which leaves the most profit. Excel, opens in Google Sheets.

    Download on Gumroad, $0+
    $0+
  • N°02

    eBay Fee Calculator 2026

    eBay final value fee, per-order fee, payout, net profit and margin. The category rate is editable. Excel, opens in Google Sheets.

    Download on Gumroad, $0+
    $0+
  • N°03

    Poshmark Fee Calculator 2026

    Poshmark fee ($2.95 under $15, 20% from $15), payout, net profit and margin. Excel, opens in Google Sheets.

    Download on Gumroad, $0+
    $0+

US sellers. Rates checked October 14, 2026, with the source link for each rate in the file's Notes tab. No macros or add-ons. Not tax or financial advice.

Fee calculators (web)

  • N°07

    eBay fee calculator

    Runs in your browser. US rates from eBay's own help pages, checked October 16, 2026.

    Free
  • N°08

    Poshmark fee calculator

    Runs in your browser. US rates from Poshmark's seller guide, checked October 16, 2026.

    Free
  • N°09

    Mercari fee calculator

    Runs in your browser. US rates from Mercari's own help pages, checked October 16, 2026.

    Free
  • N°10

    Depop fee calculator

    Runs in your browser. US rates from Depop's own help pages, checked October 16, 2026.

    Free
  • N°11

    Etsy fee calculator

    Runs in your browser. US rates from Etsy's own help pages, checked October 16, 2026.

    Free
  • N°12

    Vinted fee calculator

    Runs in your browser. US rates from Vinted's own help pages, checked October 16, 2026.

    Free

For WordPress

  • N°04

    WordPress Plugin Intel

    One row per WordPress.org plugin from the official plugin API: installs, rating breakdown, days since update, support resolution rate, compatibility, and optionally recent reviews. Export as JSON, CSV or Excel. Runs on Apify; you pay per result.

    Run on Apify, $3 per 1,000 plugins
    $3 / 1,000 plugins
    $0.50 / 1,000 reviews

Paused

  • N°06

    Peekbrace

    Formats raw JSON in Chrome as a folding tree, with a raw view and copy path. Paused, not on the Chrome Web Store.

    Read about Peekbrace
    Paused