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Ad Fill Rate, Viewability & Monetization Checks

Investigate ad performance with fill-rate and viewability calculations, standard-size previews and an evidence-based monetization report. Turn matching observations into specific checks for your own setup.

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20 purpose-built toolsLocal-first privacyIndependent diagnostics

Turn publisher setup problems into practical next steps

Use ADXProbe to fetch public advertising files, inspect website-readiness signals and combine matching scan evidence with your metrics. Reports distinguish observed findings from unknowns and show where manual investigation is still needed.

Live ads.txt checker · Monetization health report · Viewability calculator

Investigate a publisher performance change

  1. Check filled versus total ad requests

    Use counts from the same reporting period and confirm how the platform defines the metric. The ratio alone cannot identify the cause of no-fill.

  2. Compare viewable and measurable impressions

    Keep the reporting definitions consistent. This calculator uses supplied counts rather than measuring an ad on your page.

  3. Organize the next investigation

    Combine matching-domain scan evidence with the metrics you enter. Missing data remains unknown instead of becoming a fabricated health score.

Questions about ADXProbe

Can low fill rate alone explain lower advertising revenue?

No. Revenue can also change with impression volume, auction prices, deductions and other factors. Investigate matching reports before attributing the change to one ratio.

Does the ad-size preview test a live placement?

No. It is a labelled local placeholder. Check production slot width, responsive size mapping and real ad delivery separately.

Operated by Vivek Kushwah. Independent publisher utilities with transparent inputs and limitations. Read the method and official reference on each tool page.

Everything you need. Nothing you don’t.

Search, calculate, validate. Choose a tool to get started.

20 of 20 tools

Useful evidence. Clear limits.

Choose a tool, enter your own numbers or public website information, and review the result. Every report separates what was observed from what still needs a human review. No invented approval scores.

Your inputs stay yours.

Calculations and pasted-text checks run in your browser. Live scans send only your supplied public domain to the configured backend. We never ask for Google passwords, account access or API keys.

Publisher tools: methods & instructions

AdX Readiness Checker

Checks HTTPS, homepage text, recognizable policy links, ads.txt and indexing directives. A fetched link is evidence of a link, not a review of its contents.

Open AdX Readiness Checker →

AdSense Website Readiness

This advisory review cannot inspect your AdSense account, verify content rights or determine approval. Review Google policies manually.

Open AdSense Website Readiness →

Ads.txt Live Checker

Retrieves the root /ads.txt over HTTPS. Syntax does not prove seller authorization. Network failures and missing files are reported separately.

Open Ads.txt Live Checker →

Ads.txt Syntax Validator

Paste plain text to check three required seller fields, the optional certification ID and supported ads.txt 1.1 directives. Runs locally.

Open Ads.txt Syntax Validator →

Ads.txt Generator

Use the advertising-system domain and seller account ID supplied by your monetization provider. We never generate or verify real seller IDs.

Open Ads.txt Generator →

App-ads.txt Checker

Fetches /app-ads.txt from the supplied developer domain. App-store developer website links, ownership and package identity need separate verification.

Open App-ads.txt Checker →

Sellers.json Checker

Checks a domain’s root /sellers.json, or pasted JSON. Confidential entries may legitimately omit name and domain; confidentiality alone is not evidence of fraud. Files over 2 MB are explicitly refused by live scans.

Open Sellers.json Checker →

SupplyChain Validator

Supports SupplyChain 1.0 objects and common bid-request wrappers. Validates ver, complete, nodes, asi, sid and hp. Structure alone cannot prove supply-chain authenticity.

Open SupplyChain Validator →

GAM Tag Inspector

Static heuristic inspection of pasted Google Publisher Tag code. The code is never executed. Dynamic paths, comments and variable-based sizes may need manual review.

Open GAM Tag Inspector →

CPM Calculator

CPM = advertising cost ÷ impressions × 1,000. Choose a currency shared by all money inputs. Reverse calculations solve cost or impressions.

Open CPM Calculator →

eCPM Calculator

eCPM = revenue ÷ impressions × 1,000. Uses realized revenue rather than a guaranteed auction price. Reverse calculations are supported.

Open eCPM Calculator →

Page RPM Calculator

Page RPM = estimated earnings ÷ page views × 1,000. Page views and ad impressions are different denominators; this tool calculates Page RPM only.

Open Page RPM Calculator →

CTR Calculator

CTR = clicks ÷ impressions × 100. Use matching reporting periods and scope. This calculator requires clicks not to exceed impressions.

Open CTR Calculator →

Fill Rate Calculator

Default definition: filled ad requests ÷ total ad requests × 100. Platforms may define fill differently; use matching request metrics, not impressions as a substitute.

Open Fill Rate Calculator →

Ad Revenue Calculator

Daily opportunities × assumed fill rate × CPM ÷ 1,000. If impressions are already served, set fill to 100% to avoid counting fill twice. Monthly projection uses 30 days.

Open Ad Revenue Calculator →

Revenue Share Calculator

Revenue × each party’s percentage. Shares must total 100%. The optional 88/12 split is an editable example, not a claimed industry or Google contract.

Open Revenue Share Calculator →

Viewability Calculator

Viewability = viewable ÷ measurable impressions × 100. Measurable impressions are those where viewability could be measured; they are not the same as all served impressions.

Open Viewability Calculator →

CPC Calculator

CPC = total advertising cost ÷ clicks. Choose a calculation mode to solve for CPC, total cost or clicks using a consistent currency.

Open CPC Calculator →

Ad Size Preview

Visual placeholders only: 300×250, 336×280, 320×50, 320×100, 728×90, 970×250, 160×600 and 300×600. Large previews scale down to fit; actual dimensions stay visible. No ads are requested.

Open Ad Size Preview →

Monetization Health Report

Rules-based suggestions use matching live scan results from this browser session and metrics you supply. No fabricated score, AI claim or official eligibility decision. Thresholds are diagnostic heuristics, not Google requirements.

Open Monetization Health Report →

Independent readiness assessment — not an official Google approval decision. Technical findings cannot establish content compliance, traffic quality or monetization eligibility.

Good questions. Straight answers.

Can ADXProbe approve my website for AdX or AdSense?

No. Google or the applicable authorized process decides approval. ADXProbe offers independent technical checks and manual-review guidance.

Why do live checks need a backend?

Browsers restrict many cross-origin website requests. A configured scanning backend retrieves permitted public files safely. Without it, live tools show “Live Scan Not Configured”; local tools remain usable.

Does a valid ads.txt file prove seller authorization?

No. Valid formatting only establishes that a file follows supported syntax. Confirm the account ID and commercial relationship with the advertising provider.

Are revenue projections guaranteed?

No. They are calculations from your assumptions. Actual demand, geography, viewability, consent, invalid traffic deductions and reporting definitions affect outcomes.

Can these tools rank in Google or appear in AI answers?

Useful original content and sound technical SEO support discovery, but rankings, indexing and AI recommendations are never guaranteed. Separate tool pages can be developed later with their own unique explanations and functionality.

A 970 × 250 Preview Fits Your Screen—Will the Real Ad Fit?

By

A large ad placeholder can be scaled down to fit a preview without changing the original creative dimensions. Seeing it fit inside this tool does not establish that a real creative of that size will fit your mobile placement.

Read the original dimension label

Open the ad size preview and select 970 × 250. On a narrow screen, the illustration scales to fit the available preview area. The label still describes a 970-pixel-wide, 250-pixel-high format. It has not become a different ad size.

The preview supports eight predefined formats. It does not request an ad, render a supplied creative or measure the container on your production page.

Check the actual placement

  1. Identify the real container width on the device you are testing.
  2. Compare the slot’s eligible size declarations with that space.
  3. Review responsive size mapping where your setup uses it.
  4. Test the actual page and creative delivery using appropriate platform diagnostics.

Google’s GPT ad-size guide explains fixed, multi-size, fluid and responsive setups. A visually resized placeholder is not a substitute for those production configurations.

Separate three questions

  • Proportion: what shape does the selected format have?
  • Eligibility: which creative sizes does the slot declare?
  • Delivery: what did the real request and rendered page produce?

Our preview answers the first question. The GAM tag inspector can help inspect recognizable declarations in supplied code, but it also does not prove live delivery.

Should I stretch a real ad with CSS to imitate the preview?

The preview is an illustration, not implementation advice for modifying advertisements. Follow the platform’s supported setup and relevant policies. Check the reader experience and layout rather than treating a screenshot as proof of compatibility.

Official references

References checked: 26 October 2026. Examples identified as fictional are teaching inputs, not performance benchmarks.

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