How to Build a Browser-Based PDF Blur Tool Using JavaScript
July 24, 2026 / #JavaScript How to Build a Browser-Based PDF Blur Tool Using JavaScript Bhavin Sheth Many PDF documents contain information that shouldn't be shared publicly. Personal details, financial figures, signatures, addresses, account numbers, employee information, or confidential business data often need to be hidden before a file is sent to someone else. Instead of permanently removing content, it places a blur effect over selected areas of a PDF so sensitive information becomes difficult to read while the rest of the document remains unchanged.
- ▪July 24, 2026 / #JavaScript How to Build a Browser-Based PDF Blur Tool Using JavaScript Bhavin Sheth Many PDF documents contain information that shouldn't be shared publicly.
- ▪Personal details, financial figures, signatures, addresses, account numbers, employee information, or confidential business data often need to be hidden before a file is sent to someone else.
- ▪Instead of permanently removing content, it places a blur effect over selected areas of a PDF so sensitive information becomes difficult to read while the rest of the document remains unchanged.
freeCodeCamp files mainly under programming. We currently carry 9 of its stories.
Story provenance
Source · retrieval · rights · ranking — open for full record
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Story provenance
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More |
| Canonical URL | https://www.freecodecamp.org/news/build-pdf-blur-tool-javascript/ |
| Publication time | Fri, 24 Jul 2026 20:44:56 +0000 |
| Retrieval time | 2026-07-26T10:02:19.242Z |
| Last seen | 2026-07-26T10:02:19.242Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | d_0877Oay7_v |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
July 24, 2026 / #JavaScript How to Build a Browser-Based PDF Blur Tool Using JavaScript Bhavin Sheth Many PDF documents contain information that shouldn't be shared publicly. Personal details, financial figures, signatures, addresses, account numbers, employee information, or confidential business data often need to be hidden before a file is sent to someone else. A PDF Blur Tool makes this process simple. Instead of permanently removing content, it places a blur effect over selected areas of a PDF so sensitive information becomes difficult to read while the rest of the document remains unchanged. In this tutorial, you'll build a browser-based PDF Blur Tool using JavaScript.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More .
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