Listed on IndieTools
PDF Dark vs ZeroCloudPDF
PDF Dark and ZeroCloudPDF are publicly listed products on IndieTools. This comparison brings their recorded features, pricing and product information together, alongside stored mobile and desktop website measurements where available so you can check the details that matter to your workflow.
Side-by-side facts · Product order does not indicate a winner
Last updated:
ZeroCloudPDF
ZeroCloudPDF converts, compresses and merges PDFs entirely in your browser. No upload, no account, no server contact. JPG, PNG, HEIC, Word to PDF and back. Pure JavaScript. Privacy first. Free.
Published listing
Listed on IndieTools
At a glance
Available listing details and recorded measurements. An unavailable value is not a negative result.
| Detail | PDF Dark | ZeroCloudPDF |
|---|---|---|
| Categories | ||
| Ahrefs Domain Rating |
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| Mobile performance |
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| Public founders | ||
| Published on IndieTools |
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Key differences
- The stored Ahrefs Domain Rating is 18 for pdfdark.org (Oct 8, 2026) and 1 for zerocloudpdf.com (Oct 8, 2026). Domain Rating describes backlink strength, not product quality.
- The recorded mobile performance scores are 68/100 for PDF Dark (Oct 9, 2026) and 77/100 for ZeroCloudPDF (Oct 9, 2026), using psi-mobile-two-sample-mean-v1 with 2 samples each. These are separate laboratory observations.
- The listed use cases differ: PDF Dark lists Read a PDF with a dark background, Adjust PDF darkness and warmth; ZeroCloudPDF lists Compress PDF documents, Combine PDF files. Test the specific workflow you need before choosing.
What they have in common
- Both are listed in Productivity on IndieTools.
Domain Rating
Domain Rating is an Ahrefs backlink-strength metric, not a Google ranking score or a measure of product quality. Public readings must match the current product domain and be no more than 21 days old. History covers recorded readings for that domain; missing history does not mean the rating never changed.
PDF Dark
18/ 100
pdfdark.org
Measured
- Previous measurement
- 13 ·
- Change from previous
- +5 points
- Highest recorded
- 18
- Recorded measurements
- 25
ZeroCloudPDF
1/ 100
zerocloudpdf.com
Measured
- Previous measurement
- 2 ·
- Change from previous
- -1 points
- Highest recorded
- 4
- Recorded measurements
- 25
Website performance
Speed values are stored laboratory measurements, not real-user Core Web Vitals. Mobile and desktop runs may have different dates, sample counts and methodologies; compare the same device and method. Missing results are unavailable, not zero, and no overall winner is inferred.
Mobile measurements
PDF Dark
68Performance / 100
Measured
2 samples
Method: psi-mobile-two-sample-mean-v1
ZeroCloudPDF
77Performance / 100
Measured
2 samples
Method: psi-mobile-two-sample-mean-v1
| Detail | PDF Dark | ZeroCloudPDF |
|---|---|---|
| First Contentful Paint |
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| Largest Contentful Paint |
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| Cumulative Layout Shift |
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| Total Blocking Time |
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| Speed Index |
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| Time to First Byte |
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| Load time |
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What is PDF Dark?
PDF Dark converts any PDF to true dark mode entirely in your browser. Free, open-source, no upload required. Works on any PDF, fully client-side.
Explore PDF DarkWhat is ZeroCloudPDF?
ZeroCloudPDF is a privacy first PDF toolkit that runs entirely inside your web browser. Every conversion, compression and merge operation happens locally on your device using pure JavaScript. Your files never leave your computer, which means there is zero server contact, no upload queue and no data retention risk. The toolset covers the full document workflow. You can convert JPG, PNG, HEIC and generic image files to PDF. You can turn Word documents into PDF using a browser native pipeline built on mammoth.js and jsPDF. You can extract pages from PDF back into JPG or PNG images. You can merge multiple PDFs into a single file in any order you choose. You can compress large PDFs down to sizes…
Selected listed features
PDF conversion
PDF compression
PDF merging
Use cases and audience
Use cases and audiences below reflect the information provided in each product listing.
PDF Dark
- Read a PDF with a dark background
- Adjust PDF darkness and warmth
ZeroCloudPDF
- Compress PDF documents
- Combine PDF files
Meet the founders
Explore the publicly listed founder profiles connected to each product.
PDF Dark
ZeroCloudPDF
Choosing for your workflow
- Consider PDF Dark when evaluating Read a PDF with a dark background, Adjust PDF darkness and warmth. These are the use cases listed by the product; test your own workflow before choosing.
- Consider ZeroCloudPDF when evaluating Compress PDF documents, Combine PDF files. These are the use cases listed by the product; test your own workflow before choosing.
- Use website measurements to review a measured page and device, then test your own application workflow. A landing-page score does not establish application performance or an overall winner.
Frequently asked questions
- What is the difference between PDF Dark and ZeroCloudPDF?
- The stored Ahrefs Domain Rating is 18 for pdfdark.org (Oct 8, 2026) and 1 for zerocloudpdf.com (Oct 8, 2026). Domain Rating describes backlink strength, not product quality. The recorded mobile performance scores are 68/100 for PDF Dark (Oct 9, 2026) and 77/100 for ZeroCloudPDF (Oct 9, 2026), using psi-mobile-two-sample-mean-v1 with 2 samples each. These are separate laboratory observations.
- Which should I choose: PDF Dark or ZeroCloudPDF?
- Consider PDF Dark when evaluating Read a PDF with a dark background, Adjust PDF darkness and warmth. These are the use cases listed by the product; test your own workflow before choosing. Consider ZeroCloudPDF when evaluating Compress PDF documents, Combine PDF files. These are the use cases listed by the product; test your own workflow before choosing.
- Are these mobile and desktop Speed scores directly comparable?
- Speed values are stored laboratory measurements, not real-user Core Web Vitals. Mobile and desktop runs may have different dates, sample counts and methodologies; compare the same device and method. Missing results are unavailable, not zero, and no overall winner is inferred.
- What does Domain Rating tell me about these products?
- Domain Rating is an Ahrefs backlink-strength metric, not a Google ranking score or a measure of product quality. Public readings must match the current product domain and be no more than 21 days old. History covers recorded readings for that domain; missing history does not mean the rating never changed.
- Who are the founders listed for PDF Dark and ZeroCloudPDF?
- PDF Dark: 杨云杰. ZeroCloudPDF: ZerocloudPDF. Only public, accepted founder relationships are included.
- Are PDF Dark and ZeroCloudPDF alternatives?
- Their public listings overlap in the categories Productivity, making them candidates to evaluate together. This overlap does not establish feature parity or interchangeability; check integrations, limits and your required workflow.
- Where do the comparison details come from?
- Product descriptions, pricing, platforms, countries and technologies come from public IndieTools listings and founder-provided details. Domain Rating comes from stored Ahrefs readings; Speed comes from stored measurement records. Last updated reflects the latest recorded listing, feature, measurement or public activity change shown here, not a fresh website audit.
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