Developer

Encodes and decodes Base64 and Base64URL for text or files, handling UTF-8 correctly.

Converts a curl command into fetch, axios, Python requests, Go, PHP or PowerShell.

Flattens nested JSON into columns or rebuilds objects from a table, with a dot-path column naming rule.

Converts either way, preserving key order and choosing block or flow style for the YAML side.

Compares two JSON documents structurally, ignoring key order and reporting added, removed and changed paths.

Pretty-prints, minifies and validates JSON, pointing at the exact line and column of a syntax error.

Infers TypeScript interfaces or types from a JSON sample, merging optional and union fields.

Decodes header and payload, shows claim expiry in local time, and checks the signature against a supplied key.

Tests a regular expression against sample text with live match highlighting and capture group listing.

Formats SQL with configurable keyword case, indentation and comma placement, across major dialects.

Computes MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC-32 of a string, with an uppercase and Base64 output option.

Percent-encodes and decodes URLs and query values, with a component-versus-whole-URL mode.

Generates UUID v1, v4, v5 and v7 in bulk, and decodes the timestamp out of a v1 or v7 value.

Re-indents YAML consistently, validates it, and flags the tab and anchor mistakes that break parsers.

Parses a .env file and converts it to JSON, YAML, shell exports, Docker or Kubernetes formats.

Builds a .gitignore by combining language, framework and editor templates, with duplicates merged.

Hashes a password with bcrypt at a chosen cost and checks a password against an existing bcrypt hash. Detects argon2 but does not compute it.

Parses a PEM or DER certificate or CSR and shows subject, SANs, validity, key usage and chain hints.

Converts between octal, symbolic and checkbox permission views, including setuid and sticky bits.

Renders a code snippet as an image with syntax highlighting, a window frame and a chosen theme.

Builds a cron expression field by field, each typed into its own box with its legal range beside it, and shows the resulting schedule as you change it.

Explains a cron expression in plain language and lists the next runs in a chosen timezone.

Formats or minifies CSS without reordering anything, preserving the token stream exactly.

Turns a docker run command line into a compose service definition, and converts back the other way.

Hashes files of any size in a streaming pass and compares the result against a pasted expected value.

Opens a HAR capture as a waterfall and strips cookies, auth headers and tokens before you share it.

Computes an HMAC over a message with a chosen hash and key encoding, for webhook signature checks.

Formats or minifies HTML, preserving inline elements and optionally collapsing whitespace.

Escapes and unescapes HTML entities, with named, decimal and hexadecimal output.

Explains every status code with its spec meaning, cacheability and the mistakes people make with it.

Strips comments and whitespace from JavaScript or TypeScript without renaming anything, and re-indents a minified bundle so it can be read again.

Runs jq 1.7 filters against pasted JSON in the browser with a cheatsheet, and hands you the matching command line.

Converts between JSON and XML with configurable handling of attributes, arrays and text nodes.

Converts between NDJSON and a JSON array, and reports the number of any line that will not parse instead of stopping.

Validates a document against a JSON Schema and reports each failure with its instance path.

Generates Go structs with json tags from a JSON sample, including nested and repeated types.

Infers a JSON Schema from one or several samples, unioning the shapes it sees.

Builds a Zod schema from a JSON sample, with nullable, optional and enum inference.

Runs a JSONPath expression against a document and highlights the matched nodes as you type.

Fetches a JWKS endpoint, picks the key by kid and verifies a token’s signature and standard claims.

Generates RSA, ECDSA or Ed25519 key pairs and exports them as PEM, JWK or OpenSSH.

Decodes every Base64 value in a Secret manifest, and re-encodes an edited one ready to apply.

Looks up a MIME type from an extension or the other way round, and sniffs the type from file bytes.

Compares two OpenAPI documents and separates breaking changes from additive ones.

Breaks a regular expression into a labelled tree so you can read what each part actually matches.

Maps a minified stack trace back to original files and lines using a source map you supply.

Generates an OpenSSH key pair with a comment and shows the fingerprint. The private key comes out unencrypted — add a passphrase locally with ssh-keygen -p.

Escapes and unescapes strings for JSON, JavaScript, SQL, shell, CSV and regular expressions.

Encrypts a message with AES-GCM from a passphrase and produces a self-contained Base64 blob.

Generates sortable ULIDs or short NanoIDs with a chosen alphabet and length, and shows collision odds.

Indents XML and reports the line and column of the first well-formedness fault.

Renders a table as monospaced ASCII, Markdown or box-drawing borders for READMEs and comments.

Opens an exported image tarball and shows each layer’s command, size and the files it added or deleted.

Formats queries and SDL, validates a document against a schema and prints the type it resolves to.

Shows any file as an offset/hex/ASCII dump, identifies the magic bytes and highlights a search hit.

Converts between JSON and TOML, mapping nested objects onto table headers.

Generates serde-annotated Rust structs from a JSON sample, with Option for nullable or missing fields and snake_case renames.

Compares common open-source licences by obligation and compatibility and emits the LICENSE file.

Checks an OpenAPI document for missing responses, unused schemas, references that point at nothing and the other faults that break code generators.

Decodes a protobuf payload without the .proto file, inferring field numbers, wire types and nesting.

Checks which versions satisfy a range, compares two versions and sorts a list in precedence order.

Formats and validates TOML, normalising table ordering and inline-table style.

Breaks a user-agent string into browser, engine, OS and device, and shows your own for comparison.

Lists imports, exports, memory and section sizes of a .wasm module and prints its text format.

Evaluates an XPath or CSS selector against XML or HTML and lists every matched node.