Private browser tool
Heading Structure Checker
Map HTML layout code hierarchies (H1-H6) to flag structural ordering warnings. Runs in your browser with no account required.
Always Free
Local processing
No account needed
{{ activeTool.name }}
Drag & drop your image here
Supports JPG and PNG • Up to 50MB
Supports JPG, PNG, and WebP • Up to 50MB and 40 megapixels
Tab Preview Simulation
Original: {{ formatBytes(originalFile.size) }}
Optimized: {{ formatBytes(outputBlob.size) }}-
{{ savingsText }}
Dimensions: {{ outputDimensions }}
The uploaded file format is already matching the requested conversion format. Compression will still apply.
WebP compression preserves alpha transparency channel presets. Converting transparent PNGs to JPEGs will discard transparency backgrounds.
Compression Quality
{{ quality }}%
Output Format
Width (px)
Height (px)
Platform Size Presets
Crop & Fit Mode
Padding Fill Color:
Crop Positioning Align
Resize Scale
{{ resizePercent }}%
Select Crop Aspect Preset
Crop Frame Size Scale
{{ cropScale }}%
Circle Crop Size Scale
{{ cropScale }}%
Rotate Angle
Flip Asset Mirror
Flip Asset Mirror
Watermark Text
Font Size (px)
Font Color
Opacity ({{ Math.round(watermarkOpacity*100) }}%)
Position
Click anywhere on the image above to select pixel color
{{ pickedColor }}
{{ pickedColorRgb }}
Download Favicon Outputs
{{ field.label }}
Paste Base64 Encoded Image Code (e.g. data:image/png;base64,...)
Target Output Format
{{ activeTool.name }}
Upload PDF Document
Select multiple PDF files to combine them
Select a PDF file to edit pages
Selected PDFs to Merge
{{ file.name }}
{{ formatBytes(file.size) }}
Document Pages Grid
{{ page.label }}
Enter Page Ranges to Split (e.g. 1-2, 4)
Compiling document streams...
{{ pdfProgress }}%
From (Company)
To (Client)
Document ID #
Date
Line Items Billing Grid
Tax Rate (%)
Flat Discount Amount ($)
Base Amount ($)
GST rate (%)
Tax Calculation
Base Amount ($)
VAT rate (%)
Tax Calculation
Cost of Item ($)
Selling Price ($)
Original Price ($)
Discount Percentage (%)
Percentage mode
X value
Y value
Total Fixed Costs ($)
Variable Cost per Unit ($)
Selling Price per Unit ($)
Total Campaign Cost ($)
Total Impressions
Total Campaign Cost ($)
Total Clicks
Total Clicks
Total Impressions
Ad Campaign Revenue ($)
Cost of Advertising ($)
Words: {{ seoStats.words }}
Chars: {{ seoStats.chars }}
Reading: {{ seoStats.readingTime }}m
Paragraphs: {{ seoStats.paragraphs }}
|
|
Number of Paragraphs
Number of Words
Number of Names
Page URL
Page Title (Meta Title)
Preview guidance: {{ seoTitle.length }} characters
Page Description (Meta Description)
Preview guidance: {{ seoDesc.length }} characters
Search engines truncate snippets to fit the result layout; these counts are preview guidance, not enforced Google limits.
Language or locale code
Open Graph Image URL
Sitemap XML Address
Crawl Delay (Seconds)
Old Path (Source)
New Path (Destination)
Redirect Type Code
Entity/Site URL
Site Title
Banner/Image Address
Website Address
Campaign Source
Campaign Medium
Campaign Name
Telephone Number (Include Country Code, e.g. 15417543010)
Pre-filled Chat Message
Recipient Email Address
CC Address
BCC Address
Email Subject Header
Email Body Message
Link URL or raw text
Draft text message content
Characters:
{{ seoStats.chars }}
✓ Subject length is perfect for desktop & mobile
⚠ Length exceeds 60 character desktop boundary limit
✓ Tweet fits in standard 280 character limit
⚠ Exceeds 280 character limit ({{ seoStats.chars - 280 }} chars too long)
Hashtags:
{{ seoCaptionStats.hashtags }} / 30
✓ Fits Instagram limits
⚠ Exceeds Instagram constraints
✓ Fits LinkedIn's 3,000-character post limit
⚠ Exceeds the LinkedIn post limit by {{ seoStats.chars - 3000 }} characters
Hashtags found:
{{ seoCaptionStats.hashtags }}
Conversion Target Category
Suggested CTA options (Click to copy)
Color 1
Color 2
Angle ({{ gradientAngle }}°)
Type
Offset X ({{ shadowX }}px)
Offset Y ({{ shadowY }}px)
Blur ({{ shadowBlur }}px)
Spread ({{ shadowSpread }}px)
Shadow Color
All Corners ({{ borderRadiusAll }}px)
Top Left ({{ borderRadiusTopLeft }}px)
Top Right ({{ borderRadiusTopRight }}px)
Bottom Left ({{ borderRadiusBottomLeft }}px)
Bottom Right ({{ borderRadiusBottomRight }}px)
Select color using standard browser picker
Hex:
{{ pickerColorHex.toUpperCase() }}
Paste a HEX, RGB, or HSL color
Enter a valid HEX, RGB, or HSL value.
Password Length
{{ passLength }}
{{ generatedPassword }}
Enter Password to Analyze
Complexity Grade:
{{ passwordStrengthOutput.label }}
Entropy:
{{ passwordStrengthOutput.entropy }} Bits
Estimated Crack Time:
{{ passwordStrengthOutput.crackTime }}
Enter Input String
MD5 checksum:
{{ hashedMd5 }}
SHA-1 hash:
{{ hashedSha1 }}
SHA-256 hash:
{{ hashedSha256 }}
SHA-512 hash:
{{ hashedSha512 }}
Quantity
Generated UUID v4 Keys
Min Value
Max Value
Quantity
Generated Values
{{ num }}
Number of Dice
Dice type
{{ val }}
Number of Coins
{{ val }}
Document Visual Live Sheet Preview
{{ activeTool.name.split(' ')[0] }}
Document ID: {{ invoiceNumber }}
{{ invoiceCompany }}
Date: {{ invoiceDate }}
Billed To
{{ invoiceClient }}
| Description | Qty | Price | Subtotal |
|---|---|---|---|
| {{ item.desc }} | {{ item.qty }} | ${{ item.price }} | ${{ item.price * item.qty }} |
Subtotal:
${{ invoiceSubtotal }}
Discount:
-${{ invoiceDiscount }}
Tax ({{ invoiceTaxRate }}%):
+${{ invoiceTaxAmount.toFixed(2) }}
Grand Total:
${{ invoiceTotal.toFixed(2) }}
Tax allocation breakdown
Base Amount:
${{ activeTool.type === 'fin-gst' ? gstOutput.base : vatOutput.base }}
Tax Amount:
+${{ activeTool.type === 'fin-gst' ? gstOutput.tax : vatOutput.tax }}
Gross Total:
${{ activeTool.type === 'fin-gst' ? gstOutput.total : vatOutput.total }}
Margin metrics
Gross Profit:
${{ marginOutput.profit }}
Profit Margin:
{{ marginOutput.margin }}%
Markup Percentage:
{{ marginOutput.markup }}%
Discount Savings
Total Discount Savings:
${{ discountOutput.savings }}
Final Net Price:
${{ discountOutput.total }}
Evaluated Result:
{{ percentOutput }}
Break-even Thresholds
Break-even volume:
{{ breakEvenOutput.units }} units
Required sales revenue:
${{ breakEvenOutput.revenue }}
Calculated Campaign CPM:
${{ cpmOutput }}
Calculated Cost Per Click (CPC):
${{ cpcOutput }}
Click-Through Rate (CTR):
{{ ctrOutput }}
Campaign ROAS Index
ROAS multiplier ratio:
{{ roasOutput.ratio }}
Return Percentage:
{{ roasOutput.percent }}
Calculated Output Results
Extracted Keyword Density
| Keyword | Count | Density |
|---|---|---|
| {{ item.word }} | {{ item.count }} | {{ item.percent }}% |
| No significant keywords extracted. | ||
Google SERP Snippet Preview
{{ seoUrl || 'https://example.com/' }}
{{ seoTitle || 'My Page Title' }}
{{ seoDesc || 'This is a description of my web page.' }}
Image preview
{{ seoUrl.replace('https://', '') }}
{{ seoTitle }}
{{ seoDesc }}
Image preview
{{ seoUrl.replace('https://', '') }}
{{ seoTitle }}
{{ seoDesc }}
Markdown Rendered View
Compiled CSS Rule snippet
Color Code Formats
HEX:
{{ activeTool.type === 'color-convert' ? devColorConverterOutput.hex : pickerColorHex.toUpperCase() }}
RGB:
{{ activeTool.type === 'color-convert' ? devColorConverterOutput.rgb : `rgb(${parseInt(pickerColorHex.slice(1,3),16)}, ${parseInt(pickerColorHex.slice(3,5),16)}, ${parseInt(pickerColorHex.slice(5,7),16)})` }}
HSL:
{{ devColorConverterOutput.hsl }}
Generated Link address
HTML Heading Tree Hierarchy
H{{ h.level }}
{{ h.text }}
No HTML headings identified. Paste complete HTML syntax tags.
SEO & Marketing workflow
Processed on this deviceNo Beginware file upload
How to use Heading Structure Checker
Map HTML layout code hierarchies (H1-H6) to flag structural ordering warnings.
-
01
Enter the source details
Provide the page content, URL, metadata, or campaign values requested by the tool.
-
02
Review the preview
Check lengths, syntax, escaping, and generated markup against the requirements of your platform.
-
03
Copy and validate
Copy the result, add it to the destination, and validate important markup before publishing.
No account required
Works in your browser
Review important output