Embed and extract robust image watermarks with 9 algorithms: spatial LSB, frequency DCT, neural-style and more. All processing happens locally in your browser.

Add and remove audio watermarks using 8 techniques: LSB, phase coding, echo hiding, DSSS, QIM, DWT Haar, patchwork and DCT.

Compute 21 cryptographic and perceptual hashes - SHA-1/2/3, BLAKE, MD5, RIPEMD-160, Whirlpool and image hashes - to fingerprint any file.

Inject hidden payloads into images with 23 pixel algorithms: spatial, frequency and deep-learning methods, then decode them back.

Detect, enroll and verify faces with landmark alignment and LBP descriptors. Build your local biometric registry.

Enroll, verify and protect your vocal identity with ECAPA voice embeddings, anti-spoof detection and liveness verification. Build your local voice registry.

Read EXIF, GPS, dimensions and format metadata from images, audio, video and documents without uploading anything.

Create OpenTimestamps proofs, verify OTS hashes and upgrade attestations to prove file existence at a point in time.

Generate Decentralized Identifiers (DID:key) with Ed25519, P-256 and RSA keys, and sign or verify messages cryptographically.

Read and write C2PA provenance metadata: sign images with ECDSA, embed COSE Sign1 manifests and inspect content credentials.

Generate a signed digital passport as PDF, DOCX or EPUB with QR verification and OpenTimestamps anchoring.

Detect image tampering with Error Level Analysis (ELA), noise inspection, JPEG marker forensics and copy-move detection.

Convert images, audio, video, documents and subtitles between 100+ formats in your browser with FFmpeg.wasm.

Strip watermarks, pixel injections, C2PA manifests and metadata from images and audio to restore original files.

Generate UUID v4/v7, ULID, NanoID and SWHID identifiers with time-ordered, random and secure variants.

Hide messages inside text with Zero-Width Characters, homoglyph substitution, synonym replacement and whitespace encoding.