[{"data":1,"prerenderedAt":986},["ShallowReactive",2],{"guide-jwt-vs-oauth-tokens":3},{"id":4,"title":5,"body":6,"date":977,"description":978,"extension":979,"meta":980,"navigation":981,"path":982,"readingTime":716,"seo":983,"stem":984,"__hash__":985},"guides\u002Fguides\u002Fjwt-vs-oauth-tokens.md","JWT vs OAuth Tokens: Understanding the Differences",{"type":7,"value":8,"toc":945},"minimark",[9,14,18,35,38,42,45,51,117,120,124,131,183,190,194,197,202,210,224,228,234,248,252,331,335,346,350,376,380,386,389,393,400,403,429,433,439,442,446,453,457,513,518,536,547,551,554,560,563,567,570,631,638,644,648,652,655,659,787,790,794,813,817,820,881,885,888,901,904,908,929,933,941],[10,11,13],"h2",{"id":12},"the-confusion-is-common","The Confusion Is Common",[15,16,17],"p",{},"\"Should I use JWT or OAuth?\" is a question that reveals a misunderstanding. JWT and OAuth are not alternatives to each other — they serve different purposes and often work together.",[19,20,21,29],"ul",{},[22,23,24,28],"li",{},[25,26,27],"strong",{},"JWT"," is a token format — a way to encode and sign data",[22,30,31,34],{},[25,32,33],{},"OAuth 2.0"," is an authorization framework — a set of rules for granting access",[15,36,37],{},"Understanding this distinction prevents costly architectural mistakes.",[10,39,41],{"id":40},"what-is-a-jwt","What Is a JWT?",[15,43,44],{},"A JSON Web Token is a self-contained, signed token that carries claims about a subject. It has three parts — header, payload, and signature — and anyone with the signing key can verify its authenticity.",[15,46,47,50],{},[25,48,49],{},"Key property",": The token contains all the information needed to validate it. No database lookup required (for signature verification).",[52,53,58],"pre",{"className":54,"code":55,"language":56,"meta":57,"style":57},"language-json shiki shiki-themes github-light github-dark","{\n  \"sub\": \"user-42\",\n  \"role\": \"editor\",\n  \"exp\": 1516242622\n}\n","json","",[59,60,61,70,87,100,111],"code",{"__ignoreMap":57},[62,63,66],"span",{"class":64,"line":65},"line",1,[62,67,69],{"class":68},"sVt8B","{\n",[62,71,73,77,80,84],{"class":64,"line":72},2,[62,74,76],{"class":75},"sj4cs","  \"sub\"",[62,78,79],{"class":68},": ",[62,81,83],{"class":82},"sZZnC","\"user-42\"",[62,85,86],{"class":68},",\n",[62,88,90,93,95,98],{"class":64,"line":89},3,[62,91,92],{"class":75},"  \"role\"",[62,94,79],{"class":68},[62,96,97],{"class":82},"\"editor\"",[62,99,86],{"class":68},[62,101,103,106,108],{"class":64,"line":102},4,[62,104,105],{"class":75},"  \"exp\"",[62,107,79],{"class":68},[62,109,110],{"class":75},"1516242622\n",[62,112,114],{"class":64,"line":113},5,[62,115,116],{"class":68},"}\n",[15,118,119],{},"A JWT is like a passport: it contains identity information, a photograph, and a signature. The verifier checks the signature — not a central database.",[10,121,123],{"id":122},"what-is-oauth-20","What Is OAuth 2.0?",[15,125,126,127,130],{},"OAuth 2.0 is an authorization framework that defines how a client application can obtain limited access to a resource on behalf of a resource owner. It specifies several ",[25,128,129],{},"grant types"," (flows):",[132,133,134,147],"table",{},[135,136,137],"thead",{},[138,139,140,144],"tr",{},[141,142,143],"th",{},"Grant Type",[141,145,146],{},"Use Case",[148,149,150,159,167,175],"tbody",{},[138,151,152,156],{},[153,154,155],"td",{},"Authorization Code",[153,157,158],{},"Server-side web apps",[138,160,161,164],{},[153,162,163],{},"Authorization Code + PKCE",[153,165,166],{},"Single-page apps, mobile apps",[138,168,169,172],{},[153,170,171],{},"Client Credentials",[153,173,174],{},"Server-to-server communication",[138,176,177,180],{},[153,178,179],{},"Device Code",[153,181,182],{},"IoT devices, CLI tools",[15,184,185,186,189],{},"OAuth 2.0 tells you ",[25,187,188],{},"how to get a token and what to do with it",". It does not mandate a specific token format — the token can be a JWT, an opaque string, or anything else.",[10,191,193],{"id":192},"self-contained-vs-opaque-tokens","Self-Contained vs Opaque Tokens",[15,195,196],{},"This is the core distinction that matters in practice.",[198,199,201],"h3",{"id":200},"self-contained-tokens-jwt","Self-Contained Tokens (JWT)",[52,203,208],{"className":204,"code":206,"language":207},[205],"language-text","eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0In0.Gfx6VO9tcxwk6xqx9yYzSfgfe\n","text",[59,209,206],{"__ignoreMap":57},[19,211,212,215,218,221],{},[22,213,214],{},"Contains readable claims inside the token",[22,216,217],{},"Verifiable without a database lookup (with the right key)",[22,219,220],{},"Stateless by design",[22,222,223],{},"Cannot be revoked before expiration (without extra infrastructure)",[198,225,227],{"id":226},"opaque-tokens","Opaque Tokens",[52,229,232],{"className":230,"code":231,"language":207},[205],"a1b2c3d4-e5f6-7890-abcd-ef1234567890\n",[59,233,231],{"__ignoreMap":57},[19,235,236,239,242,245],{},[22,237,238],{},"A random string with no embedded information",[22,240,241],{},"Requires a database or cache lookup to validate",[22,243,244],{},"Easily revokable — just delete the record",[22,246,247],{},"Fully stateful",[198,249,251],{"id":250},"comparison","Comparison",[132,253,254,267],{},[135,255,256],{},[138,257,258,261,264],{},[141,259,260],{},"Property",[141,262,263],{},"JWT (Self-Contained)",[141,265,266],{},"Opaque Token",[148,268,269,280,289,300,311,321],{},[138,270,271,274,277],{},[153,272,273],{},"Contains claims",[153,275,276],{},"Yes",[153,278,279],{},"No",[138,281,282,285,287],{},[153,283,284],{},"Needs DB lookup to verify",[153,286,279],{},[153,288,276],{},[138,290,291,294,297],{},[153,292,293],{},"Revocable",[153,295,296],{},"Hard (needs blacklist)",[153,298,299],{},"Easy (delete record)",[138,301,302,305,308],{},[153,303,304],{},"Size",[153,306,307],{},"Large (1–4 KB)",[153,309,310],{},"Small (32–64 bytes)",[138,312,313,316,319],{},[153,314,315],{},"Verifiable offline",[153,317,318],{},"Yes (with public key)",[153,320,279],{},[138,322,323,326,329],{},[153,324,325],{},"Information leakage risk",[153,327,328],{},"Yes (payload readable)",[153,330,279],{},[10,332,334],{"id":333},"when-to-use-jwts","When to Use JWTs",[15,336,337,338,341,342,345],{},"JWTs excel when you need ",[25,339,340],{},"stateless verification"," and ",[25,343,344],{},"claims distribution",".",[198,347,349],{"id":348},"best-use-cases","Best Use Cases",[19,351,352,358,364,370],{},[22,353,354,357],{},[25,355,356],{},"Microservices",": Services verify tokens locally without calling a central auth service on every request",[22,359,360,363],{},[25,361,362],{},"Third-party APIs",": The API consumer validates the token without calling your server",[22,365,366,369],{},[25,367,368],{},"Short-lived access tokens",": 5–15 minute tokens where revocation is less critical",[22,371,372,375],{},[25,373,374],{},"Federated identity",": Sharing identity claims across trust boundaries",[198,377,379],{"id":378},"example-microservices-architecture","Example: Microservices Architecture",[52,381,384],{"className":382,"code":383,"language":207},[205],"Client → API Gateway (validates JWT) → Service A (reads claims from JWT)\n                                   → Service B (reads claims from JWT)\n                                   → Service C (reads claims from JWT)\n",[59,385,383],{"__ignoreMap":57},[15,387,388],{},"No inter-service calls for authentication. Each service verifies the JWT independently.",[10,390,392],{"id":391},"when-to-use-opaque-tokens","When to Use Opaque Tokens",[15,394,395,396,399],{},"Opaque tokens are better when ",[25,397,398],{},"revocation and control"," are priorities.",[198,401,349],{"id":402},"best-use-cases-1",[19,404,405,411,417,423],{},[22,406,407,410],{},[25,408,409],{},"Internal applications",": Single-server or single-service where DB lookups are cheap",[22,412,413,416],{},[25,414,415],{},"Long-lived sessions",": Where you need to revoke access immediately",[22,418,419,422],{},[25,420,421],{},"High-security systems",": Where token content must never be exposed",[22,424,425,428],{},[25,426,427],{},"Legacy systems",": Where existing session infrastructure works",[198,430,432],{"id":431},"example-traditional-web-app","Example: Traditional Web App",[52,434,437],{"className":435,"code":436,"language":207},[205],"Client → Server (validates opaque token against Redis) → Response\n",[59,438,436],{"__ignoreMap":57},[15,440,441],{},"Simple, fast (Redis lookup \u003C1ms), and tokens are revocable instantly.",[10,443,445],{"id":444},"the-hybrid-approach-the-best-of-both","The Hybrid Approach: The Best of Both",[15,447,448,449,452],{},"Most production systems use a ",[25,450,451],{},"combination"," of JWTs and opaque tokens:",[198,454,456],{"id":455},"pattern-jwt-access-token-opaque-refresh-token","Pattern: JWT Access Token + Opaque Refresh Token",[132,458,459,478],{},[135,460,461],{},[138,462,463,466,469,472,475],{},[141,464,465],{},"Token",[141,467,468],{},"Type",[141,470,471],{},"Lifetime",[141,473,474],{},"Storage",[141,476,477],{},"Purpose",[148,479,480,496],{},[138,481,482,485,487,490,493],{},[153,483,484],{},"Access Token",[153,486,27],{},[153,488,489],{},"5–15 min",[153,491,492],{},"Memory",[153,494,495],{},"Authorize API requests",[138,497,498,501,504,507,510],{},[153,499,500],{},"Refresh Token",[153,502,503],{},"Opaque",[153,505,506],{},"7–30 days",[153,508,509],{},"HttpOnly cookie",[153,511,512],{},"Obtain new access tokens",[15,514,515],{},[25,516,517],{},"How it works:",[519,520,521,524,527,530,533],"ol",{},[22,522,523],{},"User authenticates → server issues both tokens",[22,525,526],{},"Client uses the JWT access token for API calls (stateless verification)",[22,528,529],{},"When the JWT expires, client sends the opaque refresh token",[22,531,532],{},"Server looks up the refresh token in the database → issues a new JWT + new refresh token",[22,534,535],{},"If refresh token is compromised, delete the database record — immediate revocation",[15,537,538,539,542,543,546],{},"This gives you ",[25,540,541],{},"stateless API calls"," (fast, scalable) with ",[25,544,545],{},"revocable sessions"," (secure, controllable).",[198,548,550],{"id":549},"pattern-opaque-reference-token-jwt-internally","Pattern: Opaque Reference Token + JWT Internally",[15,552,553],{},"Some systems store a JWT in a database and give the client an opaque reference:",[52,555,558],{"className":556,"code":557,"language":207},[205],"Client sends: abc123 (opaque reference)\nServer looks up: abc123 → { JWT stored in DB }\nServer validates JWT claims internally\n",[59,559,557],{"__ignoreMap":57},[15,561,562],{},"This combines the secrecy of opaque tokens with the rich claims of JWTs, at the cost of a database lookup.",[10,564,566],{"id":565},"token-size-comparison","Token Size Comparison",[15,568,569],{},"Token size affects bandwidth, especially for mobile networks:",[132,571,572,585],{},[135,573,574],{},[138,575,576,579,582],{},[141,577,578],{},"Token Type",[141,580,581],{},"Typical Size",[141,583,584],{},"Impact",[148,586,587,598,609,620],{},[138,588,589,592,595],{},[153,590,591],{},"Opaque token",[153,593,594],{},"~40 bytes",[153,596,597],{},"Minimal overhead",[138,599,600,603,606],{},[153,601,602],{},"JWT (3 claims)",[153,604,605],{},"~200 bytes",[153,607,608],{},"Moderate overhead",[138,610,611,614,617],{},[153,612,613],{},"JWT (10+ claims)",[153,615,616],{},"~1–4 KB",[153,618,619],{},"Significant overhead",[138,621,622,625,628],{},[153,623,624],{},"JWT + headers",[153,626,627],{},"Add ~50 bytes",[153,629,630],{},"HTTP overhead",[15,632,633,634,637],{},"Every API request includes the token in the ",[59,635,636],{},"Authorization"," header. A 2 KB JWT sent on 100 requests per page load adds 200 KB of overhead on mobile connections.",[15,639,640,643],{},[25,641,642],{},"Practical tip",": Keep JWT claims minimal. Only include what the resource server needs.",[10,645,647],{"id":646},"common-mistakes","Common Mistakes",[198,649,651],{"id":650},"mistake-1-using-jwts-as-session-replacements-for-browser-apps","Mistake 1: Using JWTs as Session Replacements for Browser Apps",[15,653,654],{},"Storing a long-lived JWT in localStorage creates both XSS and revocation problems. For browser-based applications with a single backend, server-side sessions with cookies are simpler and more secure.",[198,656,658],{"id":657},"mistake-2-putting-everything-in-the-jwt","Mistake 2: Putting Everything in the JWT",[52,660,662],{"className":54,"code":661,"language":56,"meta":57,"style":57},"{\n  \"sub\": \"user-42\",\n  \"name\": \"John Doe\",\n  \"email\": \"john@example.com\",\n  \"address\": \"123 Main St\",\n  \"phone\": \"555-0100\",\n  \"permissions\": [\"read\", \"write\", \"delete\", \"admin\"],\n  \"department\": \"Engineering\",\n  \"manager\": \"Jane Smith\"\n}\n",[59,663,664,668,678,690,702,714,727,758,771,782],{"__ignoreMap":57},[62,665,666],{"class":64,"line":65},[62,667,69],{"class":68},[62,669,670,672,674,676],{"class":64,"line":72},[62,671,76],{"class":75},[62,673,79],{"class":68},[62,675,83],{"class":82},[62,677,86],{"class":68},[62,679,680,683,685,688],{"class":64,"line":89},[62,681,682],{"class":75},"  \"name\"",[62,684,79],{"class":68},[62,686,687],{"class":82},"\"John Doe\"",[62,689,86],{"class":68},[62,691,692,695,697,700],{"class":64,"line":102},[62,693,694],{"class":75},"  \"email\"",[62,696,79],{"class":68},[62,698,699],{"class":82},"\"john@example.com\"",[62,701,86],{"class":68},[62,703,704,707,709,712],{"class":64,"line":113},[62,705,706],{"class":75},"  \"address\"",[62,708,79],{"class":68},[62,710,711],{"class":82},"\"123 Main St\"",[62,713,86],{"class":68},[62,715,717,720,722,725],{"class":64,"line":716},6,[62,718,719],{"class":75},"  \"phone\"",[62,721,79],{"class":68},[62,723,724],{"class":82},"\"555-0100\"",[62,726,86],{"class":68},[62,728,730,733,736,739,742,745,747,750,752,755],{"class":64,"line":729},7,[62,731,732],{"class":75},"  \"permissions\"",[62,734,735],{"class":68},": [",[62,737,738],{"class":82},"\"read\"",[62,740,741],{"class":68},", ",[62,743,744],{"class":82},"\"write\"",[62,746,741],{"class":68},[62,748,749],{"class":82},"\"delete\"",[62,751,741],{"class":68},[62,753,754],{"class":82},"\"admin\"",[62,756,757],{"class":68},"],\n",[62,759,761,764,766,769],{"class":64,"line":760},8,[62,762,763],{"class":75},"  \"department\"",[62,765,79],{"class":68},[62,767,768],{"class":82},"\"Engineering\"",[62,770,86],{"class":68},[62,772,774,777,779],{"class":64,"line":773},9,[62,775,776],{"class":75},"  \"manager\"",[62,778,79],{"class":68},[62,780,781],{"class":82},"\"Jane Smith\"\n",[62,783,785],{"class":64,"line":784},10,[62,786,116],{"class":68},[15,788,789],{},"This token is huge, leaks PII, and cannot be updated without reissuing. Use JWTs for identity — fetch detailed profile data from an API.",[198,791,793],{"id":792},"mistake-3-confusing-oauth-scopes-with-jwt-claims","Mistake 3: Confusing OAuth Scopes with JWT Claims",[15,795,796,797,800,801,804,805,808,809,812],{},"OAuth scopes define ",[25,798,799],{},"what"," the client can do (e.g., ",[59,802,803],{},"read:reports","). JWT claims define ",[25,806,807],{},"who"," the subject is (e.g., ",[59,810,811],{},"sub: user-42","). They complement each other but are not the same thing.",[10,814,816],{"id":815},"decision-framework","Decision Framework",[15,818,819],{},"Use this rapid guide to choose:",[132,821,822,832],{},[135,823,824],{},[138,825,826,829],{},[141,827,828],{},"Scenario",[141,830,831],{},"Recommended Token",[148,833,834,842,850,858,866,874],{},[138,835,836,839],{},[153,837,838],{},"Microservices with many services",[153,840,841],{},"JWT (short-lived)",[138,843,844,847],{},[153,845,846],{},"Single-server web app",[153,848,849],{},"Opaque + session",[138,851,852,855],{},[153,853,854],{},"Third-party API access",[153,856,857],{},"JWT (RS256)",[138,859,860,863],{},[153,861,862],{},"Mobile app backend",[153,864,865],{},"JWT access + opaque refresh",[138,867,868,871],{},[153,869,870],{},"Real-time revocation needed",[153,872,873],{},"Opaque tokens",[138,875,876,878],{},[153,877,174],{},[153,879,880],{},"JWT (Client Credentials)",[10,882,884],{"id":883},"summary","Summary",[15,886,887],{},"JWTs and OAuth tokens answer different questions:",[19,889,890,895],{},[22,891,892,894],{},[25,893,27],{}," answers \"how do I encode and verify claims?\"",[22,896,897,900],{},[25,898,899],{},"OAuth"," answers \"how do I grant and manage access?\"",[15,902,903],{},"In production, the most common and effective pattern combines both: use OAuth 2.0 flows to obtain tokens, issue short-lived JWTs for API access, and use opaque refresh tokens for session management.",[10,905,907],{"id":906},"related-guides","Related Guides",[19,909,910,917,923],{},[22,911,912],{},[913,914,916],"a",{"href":915},"\u002Fguides\u002Fjwt-structure-explained","JWT Structure Explained",[22,918,919],{},[913,920,922],{"href":921},"\u002Fguides\u002Fjwt-security-best-practices","JWT Security Best Practices",[22,924,925],{},[913,926,928],{"href":927},"\u002Fguides\u002F2fa-setup-guide","2FA Setup Guide",[10,930,932],{"id":931},"try-it-yourself","Try It Yourself",[15,934,935,936,940],{},"Decode any JWT to inspect its claims and verify its structure using our free ",[913,937,939],{"href":938},"\u002Ftools\u002Fjwt-decoder","JWT Decoder",". See what's inside your tokens — all processing happens locally in your browser.",[942,943,944],"style",{},"html pre.shiki code .sVt8B, html code.shiki .sVt8B{--shiki-default:#24292E;--shiki-dark:#E1E4E8}html pre.shiki code .sj4cs, html code.shiki .sj4cs{--shiki-default:#005CC5;--shiki-dark:#79B8FF}html pre.shiki code .sZZnC, html code.shiki .sZZnC{--shiki-default:#032F62;--shiki-dark:#9ECBFF}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}",{"title":57,"searchDepth":72,"depth":72,"links":946},[947,948,949,950,955,959,963,967,968,973,974,975,976],{"id":12,"depth":72,"text":13},{"id":40,"depth":72,"text":41},{"id":122,"depth":72,"text":123},{"id":192,"depth":72,"text":193,"children":951},[952,953,954],{"id":200,"depth":89,"text":201},{"id":226,"depth":89,"text":227},{"id":250,"depth":89,"text":251},{"id":333,"depth":72,"text":334,"children":956},[957,958],{"id":348,"depth":89,"text":349},{"id":378,"depth":89,"text":379},{"id":391,"depth":72,"text":392,"children":960},[961,962],{"id":402,"depth":89,"text":349},{"id":431,"depth":89,"text":432},{"id":444,"depth":72,"text":445,"children":964},[965,966],{"id":455,"depth":89,"text":456},{"id":549,"depth":89,"text":550},{"id":565,"depth":72,"text":566},{"id":646,"depth":72,"text":647,"children":969},[970,971,972],{"id":650,"depth":89,"text":651},{"id":657,"depth":89,"text":658},{"id":792,"depth":89,"text":793},{"id":815,"depth":72,"text":816},{"id":883,"depth":72,"text":884},{"id":906,"depth":72,"text":907},{"id":931,"depth":72,"text":932},"2026-05-27","Compare JWT and OAuth tokens. Learn when to use JWTs, opaque tokens, or a combination for authentication and authorization.","md",{"immutable":981},true,"\u002Fguides\u002Fjwt-vs-oauth-tokens",{"title":5,"description":978},"guides\u002Fjwt-vs-oauth-tokens","5mUzOi4EYld4UnVL-LWgeK9rVmjkGfw_K22UBGl1qz8",1780401325098]