Free tools
Free link and QR tools
159 of them: no sign-up, no email capture, no limits worth worrying about. They run in your browser against our API.
Showing all 159 tools.
Links
Free URL shortenerShorten a link instantly — no account needed.Link expanderSee where a short link really goes before you click it.Redirect checkerTrace the full redirect chain and every status code.Link safety checkerCheck a URL against common phishing and malware signals.Slug generatorTurn any title into a clean, readable URL slug.URL encoder / decoderPercent-encode or decode a URL or a single parameter.Base64 encoder / decoderEncode or decode text and URL-safe base64.URL parserSplit any URL into scheme, host, path, query and fragment.Query string builderBuild and escape a query string from key/value pairs.Punycode converterConvert an international domain to its ASCII form and back.Broken link checkerPaste a list of URLs and see which ones are dead.URL NormalizerCanonicalise a URL — lowercase host, default ports, sorted parameters — and see every change made.Tracking Parameter StripperRemove utm_*, gclid, fbclid and every other tracking parameter from one URL or a whole list.URL DiffCompare two URLs and see exactly what differs: scheme, host, path segments and each query parameter.Sitemap URL ExtractorPaste sitemap XML and get a flat list of every URL, with duplicate, http and length warnings.Deep Link BuilderBuild an iOS universal link, an Android intent:// URL and a web fallback for opening your app.App Links ValidatorValidate assetlinks.json or apple-app-site-association before deep links go live.SMS Length CalculatorCount GSM-7 and UCS-2 characters, segments and cost, and see what a short link saves.URL ExtractorPull every URL out of pasted text, HTML or markdown, de-duplicated and summarised by domain.Link List DeduplicatorFind exact and near-duplicate URLs in a pasted list and get the cleaned list back.Bulk URL ValidatorCheck a whole list for malformed URLs, missing schemes, punycode, over-long links and duplicate slugs.Query String MergerMerge extra parameters into a URL and see exactly which keys collided and which value won.Redirect Rule GeneratorTurn a list of from and to pairs into nginx, .htaccess, Cloudflare, Netlify and Vercel redirect rules.Vanity Slug SuggesterReadable slug ideas in several styles from a brand, campaign and channel, with where each style works.Slug Collision CheckerSpot case collisions, look-alike characters and reserved words across a list of short-link slugs.Link Expiry PlannerPick an expiry date and click limit for a campaign link, and decide what visitors see afterwards.Link-in-bio plannerOrder and group your destinations into a bio page plan with suggested button labels.Short link length optimizerCheck whether a short link fits SMS, tweets, print QR density and email subjects.Link rotation plannerSplit traffic across destinations by weight and see the expected clicks for each.Slug transliteratorHindi, Arabic, Cyrillic, Greek or accented text into a readable ASCII slug.Short URL health scoreScore a short link for HTTPS, length, readability, tracking and share readiness.Destination change checklistGenerate the checks to run before and after retargeting a live short link.Slug readability checkerFind confusing characters, casing, separators and words in a vanity slug.Case-sensitive slug auditorCompare slugs and expose collisions that differ only by letter case.Trailing slash impact checkerCompare two URL forms and explain redirect, cache and analytics impact.Query parameter budgetMeasure query-string size and rank parameters by their byte cost.
Campaigns
UTM builderBuild correctly formatted campaign URLs in seconds.UTM parserBreak a tagged URL back into its campaign parameters.Campaign name builderGenerate consistent campaign names from a naming convention.UTM auditScan a list of tagged URLs for casing, typos and missing tags.CTR calculatorClick-through rate from impressions and clicks, with benchmarks.Conversion rate calculatorConversion rate, cost per conversion and revenue per click.A/B test significanceIs that difference real, or is it noise? Two-proportion z-test.UTM Naming Convention GeneratorProduce the allowed sources, mediums, campaign pattern and rules your team should follow.Campaign URL Batch BuilderTurn one URL plus lists of sources and mediums into every tagged combination at once.UTM Bulk FixerNormalise casing and spacing across many tagged URLs and see which values were splitting your reports.Budget Pacing CalculatorWork out the daily target, whether you are ahead or behind, and the rate needed to land on budget.Campaign calendar builderTurn campaign dates into a month-by-month calendar with overlaps and UTM names.UTM to GA4 mapperSee exactly how each UTM value lands in GA4 reports and which channel group it falls into.UTM conflict finderFind the same campaign tagged different ways, and values that differ only by case.SMS link placement plannerFit copy and a short URL into one or more SMS segments.Email link tracking checklistBuild a channel-specific checklist for reliable email click attribution.Campaign taxonomy linterValidate campaign, source and medium values against one naming policy.
Metadata
Open Graph checkerSee exactly how a link will preview when shared.Meta tags checkerInspect title, description, canonical and robots tags.X (Twitter) card validatorCheck twitter: tags and preview the card.Favicon checkerFind every icon a site declares and how it will render.Canonical tag checkerFind the canonical a page declares and whether it agrees with itself.Link preview generatorWrite Open Graph tags and see the card as you type.
Developers
HTTP header checkerInspect response headers, caching and security policy.Robots.txt testerCheck whether a URL is allowed for a given crawler.DNS checker for short domainsVerify A, CNAME, CAA and AAAA records for a short domain.SSL certificate checkerIssuer, expiry and hostname match for a short domain.IP location lookupThe country, region and city a click from an IP would record.User agent parserBrowser, OS, device and whether we would treat it as a bot.HTTP status code referenceWhat each redirect and error code actually means.Hash GeneratorMD5, SHA-1, SHA-256 and SHA-512 in hex and base64, with a note on which are safe to rely on.HMAC Signature TesterCompute a webhook HMAC over a payload and compare it against the signature you were sent.UUID GeneratorGenerate up to 50 UUID v4s plus short base62 ids, with the real collision odds.Timestamp ConverterConvert between Unix seconds, milliseconds, ISO 8601 and any IANA timezone at once.CIDR CalculatorNetwork, broadcast, usable host range, mask, wildcard and host count for IPv4 and IPv6.IP in Range CheckerCheck an IP against a list of CIDR blocks — the fast way to build an office-IP exclusion list.JSON formatter and validatorPretty-print or minify JSON, find the exact line and column of a parse error, and see the shape of the document.CSV to JSON converterTurn pasted CSV into JSON records, with the delimiter detected for you and every ragged row flagged.Regex testerTest a JavaScript regular expression, see every match with its capture and named groups, and get warned about catastrophic backtracking.HTML entity encoder and decoderEncode or decode HTML entities, choosing between named entities only and escaping every non-ASCII character.MIME type lookupFind the MIME type for any file extension, or the extensions for a type, and see whether a browser displays it or downloads it.Base converterConvert numbers between base 2, 8, 10, 16, 36 and base62 — the alphabet short links are built from.DNS record builderBuild the exact A and CNAME records to add for a branded short domain, as a table and as BIND zone syntax.JWT DecoderRead a JWT header and payload, with expiry in plain English. Decodes only, never verifies.Basic Auth EncoderBuild or decode an HTTP Basic Authorization header, and see why credentials never belong in a URL.Signed Link BuilderBuild an HMAC-signed, expiring URL and get the verification code that goes with it.curl Command BuilderBuild a ready-to-run curl command for any endpoint in this platform's API.Cron ExplainerExplain a five-field cron expression in plain English and list its next five runs in your timezone.Rate Limit CalculatorWork out batch duration, safe concurrency and a retry backoff schedule for an API rate limit.Duration CalculatorThe span between two dates in days, hours, business days and seconds, ready to use as a TTL.WCAG Contrast CheckerContrast ratio with AA and AAA verdicts, plus the nearest passing shade when a pair fails.Webhook payload inspectorPretty-print a webhook payload, list its fields and verify its signature.API error explainerPaste an API error and get the meaning, whether to retry, and the fix.API endpoint snippetscurl, JavaScript, Python, PHP, Go and Ruby for any endpoint of this platform.Idempotency key generatorKeys for safe retries when creating links in bulk, and how to use them.Retry backoff plannerEvery retry delay, the total worst-case wait, and a ready snippet.Robots directive builderA robots.txt and X-Robots-Tag for a short domain, with the consequences spelled out.Security headers builderCSP, HSTS, framing and referrer headers for a short domain, as nginx, Apache or Node.Webhook event filter builderTurn selected event types and rules into a webhook filter object.Webhook delivery SLO calculatorCalculate delivery success, error budget and retry requirements.API batch chunkerSplit a link import into safe request batches with timing estimates.CSV import column mapperMap common CSV headers to link-import fields and report missing columns.
QR
Free QR code generatorStyled QR codes with logo, colours and vector download.QR code debuggerDecode a QR image and check its error correction and payload.Bulk QR generatorPaste a list of URLs, download a ZIP of QR codes.vCard QR generatorA contact card people can scan straight into their phone.Wi-Fi QR generatorShare Wi-Fi credentials without reading them out.QR scan distance calculatorHow big to print a QR code for the distance people scan from.QR contrast checkerCheck whether your QR colours will actually scan.UPI payment QRA scan-to-pay QR for any UPI ID, with an optional amount.Email QR generatorOpen a pre-addressed email with one scan.SMS QR generatorA QR that opens a text message with the number and body filled in.Calendar event QRScan to add an event straight to a phone calendar.Location QR generatorDrop a pin people can scan and navigate to.App store QROne QR that sends iPhones and Android phones to the right store.QR logo safe area calculatorWork out the largest centre logo a QR code can carry at each error-correction level, in percent and in millimetres.QR capacity plannerFind the smallest QR version that fits your payload, how much room is left, and what the version costs you in scan reliability.QR size for distanceThe minimum print size for a QR code read from a given distance.QR batch naming plannerFile names, slugs and a tracking sheet for a batch of QR codes.QR placement checklistThe specific checks for a QR code on a poster, package, vehicle, screen or table tent.Offline QR campaign plannerCreate tracked QR variants for print placements and campaign inventory.QR error-correction advisorChoose L, M, Q or H based on damage risk, logo size and scan distance.QR color accessibility checkerMeasure QR foreground/background contrast and flag unsafe color pairs.QR logo size calculatorCalculate a conservative logo area from QR modules and correction level.NFC short-link payload builderBuild a compact NDEF URI payload and estimate tag capacity.
Content
Link-in-bio previewSee how your bio page looks on phone, tablet and desktop.Post character counterCounts a post the way each platform does, links included.Markdown Link ExtractorExtract inline and reference-style markdown links into a table and flag empty anchor text.HTML Link ExtractorPull every anchor out of pasted HTML with its text, rel and target, and catch missing rel="noopener".Text to Bulk CSVTurn a pasted list of links into the CSV layout this platform's bulk importer accepts.Social Post ComposerCount a post with its link against the real limit on X, LinkedIn, Bluesky, Threads, SMS and more.
Analytics
ROI calculatorTurn spend, revenue and cost of goods into ROI, ROAS, profit and the revenue you need to break even.CPC and CPM calculatorEnter any two of spend, impressions, clicks, CPC, CPM and CTR, and the rest are worked out for you.A/B test sample size calculatorWork out how many visitors per variant a test needs, and how long that takes at your traffic level.Click decay plannerProject a campaign's click curve from its first day and an observed daily decay rate, over up to 90 days.Campaign ComparisonCompare two campaigns on clicks and conversions, and see whether the gap is real or just noise.Confidence Interval CalculatorThe confidence interval around a conversion rate, with a plain-English reading of what it means.Click Goal PlannerWork out the daily click rate a deadline needs and what each channel has to contribute.Referrer classifierSort referrer URLs into social, search, email, direct and other, with the network named.Bot user-agent checkerSpot bots and link-preview fetchers in a list of user agents before they skew your counts.Click fraud signals checkerScore a click log for bursts, repeated IPs, hosting ranges and other automation signals.Conversion funnel calculatorDrop-off per stage, the biggest leak, and what a 10% fix at each step would yield.Cohort retention tableThe retention triangle with percentages and a heat scale from cohort rows.Attribution model comparerFirst-touch, last-touch, linear, time-decay and position credit, side by side.Attribution window plannerCompare attribution windows for fast, considered and long-cycle purchases.Link inventory forecasterForecast link volume, archive load and plan headroom over time.
Geo
Country code lookupSearch every ISO country by name or code, with its continent, flag, subdivision count and cities on record.Region explorerList the states and regions of any country, with their ISO 3166-2 codes and how many cities each has on record.City searchSearch the bundled city list by name, narrowed to a country or region, with the exact codes a geo rule needs.IP range lookupSee what the bundled registry knows about an IP address — and where the honest answer is that it cannot be known.Timezone DifferenceThe live offset between two timezones, the working-hour overlap and the best meeting slots.Country language & currency lookupLanguages, currency, phone code, time zones and right-to-left flag for any country.
Domains
Short domain name scorerRate a branded short domain for length, pronunciation, ambiguity and trust.Domain migration runbookGenerate a staged branded-domain move with validation and rollback steps.DNS cutover TTL plannerPlan when to lower and restore TTL for a domain migration.Branded link launch checklistGenerate a launch checklist for DNS, SSL, redirects, tracking and QA.
Security
Social
Privacy
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Start Free — no credit card
The free plan includes 1,000 links, 6 custom domains and 50,000 tracked clicks a month, free forever. Choose a free subdomain from six shared domains. Paid plans start at $4 a month when you outgrow it, and you keep everything you have built.
Frequently asked questions
Are these tools really free?
Yes. Every tool on this page is free, works in the browser and needs no account. A fair-use rate limit applies per address.
Do I need an account to use them?
No. An account is only needed if you want to keep, edit or measure the links you create — that is what the ShortFreeURL dashboard adds.
What can I do with them?
Shorten a link, build and download a QR code, check where a redirect chain ends, debug Open Graph and Twitter card tags, build UTM parameters, and more.
Is there a free plan?
Yes. ShortFreeURL has a free plan with no card required, and every paid plan has a 7-day free trial.