Search tools

Decode ASN.1 DER/BER — paste PEM, Base64, or hex and see the tag–length–value tree behind X.509 certificates, keys, and CMS, entirely in your browser.

Generate 1D barcodes — CODE128, CODE39, EAN-13/8, UPC-A, ITF-14, MSI, Codabar and more — with live preview, colors, and PNG/SVG download, all in your browser.

Convert text between camelCase, PascalCase, snake_case, CONSTANT_CASE, kebab-case, Title Case, and more — all at once, in your browser.

Decode X.509 / PEM certificates — view subject, issuer, validity, SANs, key, and fingerprints, all in your browser.

◇ works well with JWT Debugger

Format and beautify JSON, YAML, TOML, XML, HTML, and CSS — with JSON/CSS minify and JSON schema validation.

◇ works well with JSON to Types

Turn TypeScript or Java source into a Mermaid class diagram — classes, interfaces, enums, fields, methods, inheritance, and interfaces — rendered live in your browser.

◇ works well with UML to Code

Convert colors between HEX, RGB, HSL, HSV, and OKLCH, with a picker, alpha, and a WCAG contrast checker — all in your browser.

◇ works well with CSS Unit Converter

Convert between CSS units — px, rem, em, pt, vw, vh, and more — with live visual feedback and a full conversion table.

◇ works well with Color Converter

Compare two JSON, YAML, or TOML documents by structure, not text: added, removed, and changed values with their paths. Key order and formatting are ignored. Runs in your browser.

◇ works well with Code Formatter

Compare two texts or code snippets side by side with line-level difference highlighting.

◇ works well with Data Diff

Encode and decode text with Base64, URL, and Hex — UTF-8 safe, instant, and fully in your browser.

◇ works well with Hash Generator

Open a .har network export and explore its requests, sizes, status codes, and a timing waterfall — entirely in your browser. Nothing is uploaded.

◇ works well with URL Inspector

Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes of text or a file, plus HMAC — all at once, entirely in your browser.

◇ works well with Encoder / Decoder

Convert iPhone HEIC/HEIF photos to JPG, PNG, or WebP — fast, multi-threaded batch conversion entirely in your browser. Nothing is uploaded, and location and metadata are removed by default.

Fast, multi-threaded image compression — shrink many images at once by quality or to a target file size, with WebP/JPEG output and optional resizing, entirely in your browser.

Convert, resize, and compress images between PNG, JPEG, and WebP, or copy them as a Base64 data URI — entirely in your browser.

◇ works well with Metadata Inspector

Extract the text from a screenshot, photo, or scanned document with OCR — in 18 languages, entirely in your browser. Nothing is uploaded.

Convert structured data between JSON, YAML, and TOML, live in your browser.

◇ works well with JSON to Types

Infer a SQL CREATE TABLE from a JSON sample or a JSON Schema — column types, nullability, and a primary-key guess — for PostgreSQL, MySQL, or SQLite. Runs in your browser.

◇ works well with JSON to Types

Turn a JSON sample or a JSON Schema into TypeScript, Zod, Go structs, Python dataclasses, Kotlin data classes, or Java records/Lombok. Infers optional and nullable fields. Runs in your browser.

◇ works well with JSON to SQL

Query JSON live with JSONPath — filter, slice, and recurse, and see each matched value with its path, all in your browser.

◇ works well with Code Formatter

Decode and inspect JSON Web Tokens: view the header and payload, check expiry, and verify HS/RS/PS/ES signatures — all in your browser.

◇ works well with JWT Signer

Build a JWT header and payload and sign it with HMAC (HS256/384/512) or an RSA/ECDSA private key (RS/PS/ES) — entirely in your browser. Nothing is uploaded.

◇ works well with JWT Debugger

Open a huge log file — JSON/NDJSON, logfmt, syslog, or Java/app-server text — and get instant time-range narrowing, faceting, a timeline, request tracing, and full-text search, entirely in your browser with nothing uploaded.

Write Markdown with a live GitHub-flavored preview, a table of contents, and one-click export to Markdown or HTML — entirely in your browser, nothing uploaded.

Inspect the hidden metadata in a photo or document — EXIF, GPS location, author, dates, and more — right in your browser. Download a cleaned copy with the metadata removed.

◇ works well with Metadata Stripper

Strip EXIF, GPS, author, and hidden metadata from images and documents in one batch — locally in your browser. JPEG, PNG, WebP, GIF, PDF, Office, OpenDocument & EPUB.

◇ works well with Metadata Inspector

Generate realistic fake test data — names, emails, dates, and more — as JSON, CSV, SQL, or XML, from a schema you build or import.

◇ works well with JSON to SQL

Repair garbled text where UTF-8 was misread as Windows-1252 — turn “café” back into “café” and “’” back into “’”. Runs entirely in your browser.

◇ works well with Encoder / Decoder

Turn an OpenAPI 3.x spec (JSON or YAML) into a typed TypeScript fetch client, or into models for Go, Python, Kotlin, Java, and Zod. Runs entirely in your browser.

◇ works well with JSON to Types

Hash a password with Argon2id, bcrypt, scrypt, or PBKDF2 — with OWASP-recommended parameters — and verify a password against a hash, entirely in your browser.

Redact a PDF so the text is permanently removed, not just covered — and strip its hidden metadata, comments, and attachments. Entirely in your browser, nothing uploaded.

Merge, split, reorder, rotate, and delete PDF pages, turn images into a PDF, or export pages as images — entirely in your browser, nothing uploaded.

Generate QR codes for URLs, Wi-Fi, vCards, events, email, SMS, geo, phone, and text — with selectable error correction, and PNG/SVG download.

◇ works well with QR Code Reader

Decode a QR code from an image or your camera, entirely in your browser. Reads URLs, Wi-Fi, contacts, and more — nothing is uploaded.

◇ works well with QR Code Generator

Visualize a regular expression as a railroad diagram and read a plain-English, step-by-step explanation. Hover to link the two. Runs in your browser.

◇ works well with Regex Tester

Generate example strings that match a regular expression, then send them straight into the Regex Tester. Every sample is verified to match — all in your browser.

◇ works well with Regex Tester

Build and test regular expressions live — highlight matches, inspect capture groups, and preview replacements.

◇ works well with Regex Railroad Diagram

Convert between Unix epoch time and human-readable dates — seconds, milliseconds, ISO 8601, UTC, time zones, and relative time.

◇ works well with URL Inspector

Turn a Mermaid class diagram into TypeScript, Python, Java, or C# code — classes, interfaces, enums, inheritance, and relationships — live in your browser.

◇ works well with Code to UML

Break a URL into its parts and an editable query-string table, then rebuild it. Decodes parameters and exports them as JSON. Runs in your browser.

◇ works well with Encoder / Decoder

Chain multiple tools into a pipeline and run it in one place: decode, convert, format, and generate types in sequence. Runs entirely in your browser.

Test XPath expressions against XML or HTML live — see matched nodes, their location paths, and string/number/boolean results, all in your browser.

◇ works well with Code Formatter