Web login token
B2CStandard HS256 token with short-lived session and email scope. Ideal for front-end testing.
Base64 | URL | JWT Toolkit
Free Online Base64, URL & JWT Decoder Tool
Use our free online decoder to decode Base64 strings, inspect JWT tokens, unescape URLs, translate hex data, and read binary text without leaving the browser. The all-in-one encoder and decoder suite keeps everything client-side so you can decrypt base64 online free while staying secure. It’s a base64 online decoder, jwt token decoder, url decoder online, hex decoder, and binary decoder in one.
Client-side only
Base64 & Base64URL
JWT claim insights
Hex & binary decoder
URL encode/decode helper
Why JWTSecrets?
- ✓Security scanners flag weak algorithms, missing exp, and risky claims.
- ✓Generate demo links for sharing test tokens with teammates.
- ✓Enterprise upgrades available for signature verification and policy checks.
JWT Decoder
Decode tokens locally and review header, payload, and time-based claims with instant checks—no data ever leaves your browser.
All-in-One Online Decoder
This free online decoder supports multiple formats: Base64 decoder, JWT decoder, URL decoder, Hex decoder, and Binary decoder, plus handy encoder helpers. Decode, decrypt, and convert text or tokens instantly—no server processing, 100% secure.
Common combos: base64 online decoder, jwt token decoder, url decoder online, free base64 online decoder tool.
Paste your JWT
Header
Payload
Signature
Security Score
--Claims Health
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Step-by-step JWT decoding guide
Learn how to inspect every component of a token, validate time-based claims, and avoid common bearer token pitfalls.
- 1. Inspect the header. Confirm the algorithm (`alg`) and token type (`typ`). Avoid `alg: none` and double-check key IDs.
- 2. Review the payload. Verify `iss`, `sub`, `aud`, and lifetime (`iat`, `exp`, `nbf`). Long-lived tokens are risky.
- 3. Validate context. Ensure scopes and claims align with your API and that tokens are rotated according to policy.
Claim review checklist
- ✓ Verify token origin (`iss`) and intended audience (`aud`).
- ✓ Check for role or scope escalation in custom claims.
- ✓ Ensure clock skew is handled for `nbf` and `exp`.
- ✓ Rotate secrets frequently for HMAC-based JWTs.
When to upgrade
Need deterministic verification or SOC2-compliant audit trails? Our enterprise platform validates signatures, enforces claim policies, and integrates with SIEM tooling.
Request a quoteHow to Decode Base64 or JWT Tokens Online
- Paste your Base64, JWT, URL, Hex, or Binary string into the decoder input box.
- Select the decoding type: Base64, URL, JWT, Hex, or Binary.
- Click “Decode” to view the decoded text or payload instantly.
Decoder Examples
- Base64 Online Decoder: Decode text like
SGVsbG8gV29ybGQ=. - JWT Token Decoder: Inspect payload from
eyJhbGciOi.... - URL Decoder: Convert
%20back to spaces easily. - Hex Decoder: Convert hexadecimal strings to readable text.
- Binary Decoder: Read binary text to characters.
JWT examples for common scenarios
Use these safe demo tokens to explore how claims change across B2C, B2B, and machine-to-machine flows. Click a card to load the token into the decoder.
Service-to-service token
B2BIssued by Auth0-style issuer with `aud` lock and short expiration to reduce replay risk.
Mobile refresh token
SecurityShows a risky long-lived token so you can see how the analyzer calls it out.
Latest JWT security updates
Stay informed about algorithm vulnerabilities, library CVEs, and how to harden your identity layer.
Token Hardening
Stop using `alg: none` in staging environments
Developers still ship insecure defaults. Learn how to enforce RS256 or ES256 across all environments with lint rules and CI checks.
Read insightZero Trust
JWT expiration strategy for modern SaaS
Balance user experience with security. We cover recommended TTLs, refresh rotation, and breach response playbooks.
Read insightEngineering
How to audit third-party JWT libraries
Use our checklist to confirm safe defaults, JWK caching, and algorithm agility in open-source dependencies.
Read insightNeed signature verification & policy enforcement?
Upgrade to JWTSecrets Enterprise to verify signatures against your key management system, enforce per-claim policies, and stream logs into your SIEM.
- ✓ Managed HSM integrations (AWS KMS, Azure Key Vault, GCP KMS)
- ✓ Custom claim validation (regex, allow lists, expirations)
- ✓ SOC2 Type II, ISO 27001, and GDPR compliant processing
Turnaround
We respond to RFQs within one business day with pricing, architecture notes, and integration steps.
Request a quote
Frequently asked questions
Answers to the most common questions about decoding JWTs with JWTSecrets.
How to decode Base64 online for free?
Use our free Base64 online decoder tool to convert encoded text instantly.
Can I decrypt JWT tokens safely?
Yes, use our JWT online decoder—it runs locally and does not upload tokens.
Is there an online URL decoder and encoder?
Yes, the tool includes a full URL decoder and encoder for instant conversion.
Can this tool handle Hex and Binary decoding?
Yes, the decoder supports hex decoder and binary decoder formats for quick conversion.
Is there a free base64 online decoder tool?
Yes, you can use our free base64 online decoder tool right here.
Can I decode JWT token and verify online?
Use the jwt token decoder to inspect header and payload; verification happens client-side.