Check download and upload speeds
Run a full download and upload test against Cloudflare edge servers to see your real-world throughput in Mbps.
Measure latency and jitter
Get precise latency and jitter measurements to understand connection stability for gaming, VoIP, or video calls.
Detect packet loss
Packet loss degrades streaming, gaming, and calls. The test sends probes to detect loss percentage and classify quality.
Compare test history
Past results are saved locally so you can compare speeds over time or share a result data URL with your ISP.
Verify ISP advertised speeds
Confirm whether you are getting the bandwidth you pay for. Run the test on wired and wireless to compare.
Speed Test runs entirely in your browser tab. No data is uploaded, no server processes your input, and no account is required.
Encode and decode Base64 for text, files, images, audio, and video.
Encoding & Data
Format, validate, minify, and explore JSON with tree, table, and map views.
Encoding & Data
Decode, verify (HMAC/RSA/ECDSA), encode, and compare JWTs side-by-side.
Security & Auth
Decode SSL/TLS certificates, chains, SANs, and fingerprints.
Security & Auth