The best fact-checking tools are free, browser-based, and take under two minutes to use. This guide covers the most reliable ones by category — what each tool does well, where it falls short, and when to use it.
Reverse Image Search
Reverse image search is the single most effective quick-check for viral photographs. You upload or paste an image, and the engine returns every indexed instance of that image or visually similar ones — revealing earlier appearances, original context, and misattributions.
Google Images
What it does: Matches images against Google’s web index. Access via images.google.com — click the camera icon to upload or paste a URL. On Chrome, right-click any image and select “Search image with Google.”
What it does well: Broad coverage of English-language web content; reliably surfaces news articles that have used the same photograph. Best for images that have appeared in mainstream media.
What it does not do: Google Images is weak on images that circulated primarily on closed platforms (Telegram, WhatsApp groups, Weibo) or that predate widespread web indexing. It also struggles with heavily cropped or filtered versions of an original.
TinEye
What it does: TinEye specializes in exact and near-duplicate image matching, with a database of over over 70 billion indexed images (as of 2025). Unlike Google, TinEye sorts results chronologically — letting you identify the earliest known appearance of an image online.
What it does well: Finding the original source and publication date of a photograph. The “oldest” sort is particularly useful for debunking images presented as recent that are, in fact, years old.
What it does not do: TinEye does not crawl social media platforms in real time. Images that went viral recently and then disappeared may not be indexed yet.
Yandex Images
What it does: Yandex Images uses a different index than Google, with significantly stronger coverage of Eastern European, Russian, and Central Asian web content. Access via the same camera-icon interface.
What it does well: Yandex is consistently more effective than Google for finding original sources of photographs that originated in Russian-language media or on platforms popular in that region — a relevant capability given the volume of conflict imagery originating from those areas. Journalists at Bellingcat have documented Yandex finding sources that Google misses.
What it does not do: Weaker on English-language and Western European content than Google. Use Yandex as a supplement, not a replacement.
Best practice: Run all three engines in parallel. The overlap and the gaps between results are themselves informative. For a step-by-step workflow, see our Reverse Image Search Guide →.
Source Verification
Knowing whether a website is credible requires knowing who owns it and what track record it has. Two tools handle most of this quickly and for free.
Media Bias / Fact Check
What it does: Media Bias / Fact Check (MBFC) rates over 5,000 news sources on a left-to-right bias scale and a separate factual reporting scale (Very High / High / Mixed / Low / Very Low / Conspiracy). Each entry includes a brief editorial profile and specific examples of published content that influenced the rating.
What it does well: Fast lookup for unfamiliar sources. Particularly useful for identifying outlets that mix accurate reporting with occasional misinformation (the “Mixed” and “Mostly Factual” categories) versus those that are structurally unreliable.
What it does not do: MBFC is a human-edited database with a backlog — newer or smaller outlets may not be listed. Ratings also reflect the outlet’s general record, not any specific article. A source rated “High” can publish individual errors; a “Low” source can occasionally get things right. Treat MBFC as a prior, not a verdict.
WHOIS Lookup
What it does: A WHOIS lookup reveals domain registration data — who registered a domain, when, and through which registrar. Free tools include ICANN Lookup and DomainTools.
What it does well: Detecting recently registered domains presented as established news organizations. A site claiming to be a “trusted regional news outlet” registered six weeks ago is a significant red flag. Also useful for identifying domain spoofing — near-identical domains created to mimic legitimate outlets (e.g., abcnews.com.co vs. abcnews.com).
What it does not do: Most domains now use WHOIS privacy protection, which replaces registrant details with a proxy service address. A hidden registration is not itself evidence of bad intent — many legitimate sites use privacy protection — but it does limit the tool’s usefulness for attribution.
Fact-Check Databases
Before spending time on primary research, check whether a claim has already been investigated. Professional fact-checkers at verified organizations publish their findings publicly, and their work is searchable.
Snopes
Snopes is the oldest continuously operating fact-checking site on the web, active since 1994. It covers urban legends, viral social media claims, and political misinformation with a documented methodology. Verdict labels include True, False, Mixture, Unproven, and Outdated — the last of which is particularly useful, as many viral claims are recycled from earlier news cycles where the original facts have changed.
PolitiFact
PolitiFact focuses on U.S. political claims and uses a six-point “Truth-O-Meter” scale from True to Pants on Fire. It is a Poynter Institute project and a signatory to the International Fact-Checking Network (IFCN) code of principles — meaning its methodology has been independently audited.
Full Fact
Full Fact covers UK political and public health claims and publishes an open-source automated monitoring tool. Like PolitiFact, it is an IFCN signatory.
Correctiv
Correctiv is Germany’s leading investigative and fact-checking organization. Their Faktencheck section covers German-language claims and is particularly strong on political misinformation circulating in Germany, Austria, and Switzerland.
AFP Fact Check
AFP Fact Check publishes in multiple languages and covers global claims — strong on francophone and international content where English-language fact-checkers have limited reach.
Cross-database search: The Google Fact Check Explorer aggregates claims from IFCN signatories globally, searchable by keyword. It is the fastest single entry point for checking whether a claim has already been investigated by any verified fact-checker.
Video and Deepfake Verification
Video manipulation is harder to detect than image manipulation, and the toolset is evolving rapidly. Two tools remain the most practically useful for non-specialist verifiers.
InVID / WeVerify
InVID / WeVerify is a browser plugin (Chrome/Firefox) developed by a consortium of European research institutions with EU funding. It allows users to extract keyframes from videos, run reverse image searches on individual frames, check video metadata, and analyze geolocation clues. Widely used by professional fact-checkers and investigative journalists.
What it does well: Breaking a video into searchable frames is InVID’s core strength. A manipulated video may use authentic footage edited out of sequence — frame-level reverse search catches this where a full-video search would not.
What it does not do: InVID does not perform AI-based deepfake detection. It is a provenance and context tool, not a synthetic media detector.
Deepware Scanner
Deepware Scanner analyzes uploaded or URL-submitted videos for indicators of AI-generated face synthesis. It returns a probability score, not a binary verdict.
What it does well: Screening high-stakes videos where face manipulation is suspected — political speeches, alleged celebrity statements, fabricated confession videos. The free tier handles most use cases.
What it does not do: Deepware, like all current deepfake detectors, has meaningful false-positive and false-negative rates. A “low probability” result does not confirm authenticity; it means the detector did not find the specific artifacts it was trained to recognize. Use it as one data point in a broader verification process, not as a definitive finding. For a full deepfake identification workflow, see our Deepfake Identification Guide →.
Archive and Snapshot Tools
Deleted content is not gone. Archive tools allow you to access earlier versions of web pages, check what a site published before it edited or removed material, and preserve evidence before it disappears.
Wayback Machine
The Internet Archive’s Wayback Machine has crawled and archived over 860 billion web pages since 1996. Enter any URL to see a calendar of archived snapshots. It is indispensable for checking whether a website changed its content after publication, accessing pages that have been deleted, and confirming what an outlet originally reported before issuing a stealth correction.
The Wayback Machine also accepts manual save requests via web.archive.org/save — useful for preserving evidence of misinformation before it is removed.
archive.ph
archive.ph (also accessible as archive.today) creates on-demand snapshots of web pages, rendering JavaScript-heavy content that the Wayback Machine sometimes misses. Unlike the Wayback Machine’s automated crawl, archive.ph snapshots are triggered manually and are immediately retrievable via a permanent URL. Useful for sharing evidence of a specific claim that may later be deleted.
For an integrated fact-checking workflow that uses all these tools together, the SIFT Method Guide → provides a structured decision tree. All tools listed here are free to use at the level needed for everyday verification. For documented case studies showing these tools in action, browse the Fake News Database →. Return to the Media Literacy Hub → for the full learning path.