Source Credibility Checker — Score any source against the CRAAP test, add a SIFT lateral-reading pass, and export the evaluation note

Common mistakes the Source Credibility Checker prevents

The domain-heuristic mistake is the modern default: .org means trustworthy, .edu means authoritative, first result means fine. All three fail in the same way - they read the wrapper, not the contents. Advocacy organizations publish on .org with institutional-looking layouts; .edu domains host student essays and department pages; search rank is an engagement signal, not a quality one. The checker runs the questions that actually sort sources: who wrote this and what are their credentials, who published it and what do they gain, is the claim cited to verifiable evidence, and when was it last updated. Five minutes of those questions beats any heuristic.

The second mistake is citing something you have not actually read. Preprint abstracts get cited for conclusions the preprint does not claim; news summaries of studies get cited as if they were the studies; a statistic travels through four aggregators and arrives misquoted. The checker's verification block enforces the trail: find the primary source, confirm the figure exists where you say it does, and cite the source you read. Instructors who spot-check citations spot-check the striking ones first - the statistic doing the most work in your argument is the one that must survive verification.

The third mistake is sourcing an argument from the weakest available text when the strong text was findable. Encyclopedias, listicles and AI summaries are fine for orientation and wrong for citations - they are the map, not the terrain, and rubrics grade the terrain. The checker's tier logic (primary and peer-reviewed at the top, reference and news in the middle, blogs and aggregators at the bottom) tells you not just whether a source is credible but what it is credible FOR. The upgrade habit this builds: every time you would cite a summary, spend fifteen minutes finding the study it summarized. Your bibliography and your grade both move.

Who the Source Credibility Checker is for

For the research phase, when the source pile is growing faster than the vetting. First-year students meeting their first real research assignment get a number instead of a vibe; upper-year students writing literature reviews can triage a stack of twenty PDFs in twenty minutes and know which five deserve close reading. The evaluation note is built for courses that require annotated bibliographies — education, nursing, social work — where each annotation begins with a credibility statement and most students have no idea what goes in one. It is explicitly not a blacklist: a weak score is diagnostic, not a ban, and the fix tips show what would have to change for the source to pass.

It is explicitly not for fake certainty. Every estimate the Source Credibility Checker produces is a planning instrument, not an official record — your registrar, syllabus and instructor hold the authoritative versions. The tool's job is to make your next decision faster and better-informed.

How to use the Source Credibility Checker — step by step

• Step 1: Enter the source title, URL and type
• Step 2: Read the automatic URL signals
• Step 3: Work through the five CRAAP criteria, checking what holds
• Step 4: Run the four SIFT moves on web sources
• Step 5: Copy the evaluation note into your annotated bibliography

Total time: under two minutes for a first pass, and the interactive version embedded above persists as long as the tab is open. Nothing is transmitted to any server at any point — the entire tool runs in your browser's JavaScript, which is why it also works offline once the page has loaded.

What makes this source credibility checker different

Every style guide tells you to evaluate sources; almost none tells you how, numerically, before you are three pages deep in a source you should never have used. This checker operationalizes the CRAAP test — the five criteria (Currency, Relevance, Authority, Accuracy, Purpose) that writing centers have taught for decades — as fifteen checkable questions, scores them live, and adjusts for source type, because a YouTube video and a peer-reviewed article clear different bars. Paste a URL and it reads the signals automatically: .gov and .edu domains, DOI links and academic databases, self-publishing platforms. For web sources a second pass applies the SIFT method — the four lateral-reading moves professional fact-checkers use — because what other sources say about a source outranks what it says about itself. The verdict lands on a 0-100 gauge with plain-language bands, every failed criterion links to a concrete fix, and the whole evaluation exports as a copyable note formatted for annotated bibliographies.

• 15-question CRAAP test with live scoring
• Automatic URL signal reading (.gov/.edu/DOI/platforms)
• Source-type adjustment — videos and journals judged on their own scale
• SIFT lateral-reading pass for web sources
• Copyable evaluation note for annotated bibliographies

Most free calculators in this space are ad-fenced, login-walled, or upload your input to a server for processing. This one does none of those things — the privacy posture is the feature, not the fine print.

Source Credibility Checker accuracy, limits and honest caveats

The math inside is deterministic and exact for the inputs you give it; uncertainty comes from the inputs. Grade estimates assume the syllabus weights are correct and your predicted scores are honest. Citation formatting follows the current official style manuals but cannot verify facts about your source. Deadline plans compress when reality interrupts. Wherever an institutional rule could override the tool — registrar scales, program-specific rubrics — the interface says so directly instead of pretending otherwise.

When a decision actually matters — academic standing, scholarship eligibility, graduation audit — confirm the number with the office that owns it, then use this tool for the weekly decisions that lead there.