Parse, highlight, validate, and generate NACHA ACH files entirely in your browser.
Validate and compute check digits using Verhoeff, Damm, and ISBN-10 algorithms — with step-by-step breakdowns.
Decode and inspect WebAuthn / passkey payloads — AAGUID lookup, attestation object decoder, clientDataJSON parser, and a live Passkey Playground.
Generate themed placeholder text — Lorem Ipsum, Fintech, Startup, Corporate, Developer, Design, Legal, and Hipster flavors.
Paste a messy list and deduplicate, sort, trim, or reformat it instantly.
Prettify and validate JSON data.
Paste any text payload and instantly see its compressed size across gzip, deflate, deflate-raw, and brotli — entirely in the browser.
Encode and decode Base64 strings.
Parse cron expressions into human-readable schedules and see upcoming triggers.
Generate UUIDs (v1, v3, v4, v5, v7) and ULIDs with history.
Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes.
Search all ISO 4217 currency codes with exponents, symbols, numeric codes, and country flags.
Validate credit card numbers or generate a valid test number for a given IIN/BIN.
Convert between Unix timestamps and human-readable dates.
Generate RSA, EC, and Ed25519 JSON Web Keys (JWK) in your browser, or convert existing PEM keys to JWK format with RFC 7638 thumbprints.
Prettify and validate TOML config files in the browser — syntax-highlighted output with line numbers and precise error locations.
A quick-search grid for HTTP status codes (1xx–5xx) with short descriptions — saves a trip to MDN when debugging a weird 422 or 409.
Compare two texts side-by-side or inline — great for config files and API responses.
Generate cryptographically random passwords and secrets using the Web Crypto API — configurable length, character sets, and batch mode.
Generate styled QR codes for URLs or text with custom dot shapes, corner styles, colour gradients, and an optional centre logo.
Prettify and validate XML in the browser — syntax-highlighted output with line numbers and precise error locations.
Simulate how different rounding algorithms — Banker's, Floor, Ceiling, Half-up, Truncate — affect loan balances month by month and diverge over time.
Upload a video, seek to any position to capture PNG frames, or convert a short clip into an animated GIF — all client-side, nothing uploaded.
Percent-encode and decode URL components.
Convert JPEG, PNG, and other images to WebP with adjustable quality and optional resizing — fully in the browser.
Live character, word, sentence, and byte counts with reading time, speaking time, and SMS segment detection.
Pick any color from your screen with the EyeDropper API and instantly see hex, RGB, HSL, HSV, HWB, CMYK, LCH, oklch, display-P3, and more — all one-click to copy.
Paste a hex bitmap string and instantly see which ISO 8583 fields are active, with field names, types, and descriptions for all 128 bits.
Minify and clean SVG files in the browser using SVGO — strip metadata, collapse groups, and shrink path data.
Calculate loan amortization, daily interest accrual, and total cost for credit cards, BNPL, mortgages, and more.
Convert between YAML and JSON instantly in the browser.
Decode JSON Web Tokens in the browser — header, payload, and signature — without sending your token anywhere.
Convert between CSV and JSON instantly in the browser — paste either format and convert with one click.
Generate RSA public/private key pairs for encryption or signing in the browser — keys never touch a server.
Paste a raw HTTP header block and get a clean table with explanations for common headers like Cache-Control, Content-Type, and X-Frame-Options.
Upload an audio file, drag trim handles on the waveform, preview the selection, and export as a WAV file — entirely in your browser.
Convert between TOML and JSON instantly in the browser — auto-detects direction from input.
Compute CRC-32, CRC-16, CRC-8, Adler-32, byte checksum, and parity bit for any text or hex byte input — with an expected-value verifier.
38 tools