No tool matches that. Try a format like "yaml" or a task like "diff".
JSON tools
Format, validate, minify, diff, and convert JSON — to and from YAML and CSV.
JSON Formatter
Format, indent, and validate JSON in your browser. Paste minified or messy JSON and get clean, readable output instantly — nothing leaves your browser.
JSON Minifier
Strip whitespace and line breaks from JSON to shrink its size before sending it over the wire or embedding it inline — runs entirely in your browser.
JSON Diff
Compare two JSON documents by structure and see exactly which keys were added, removed or changed, with full paths. Key order and whitespace are ignored.
YAML → JSON
Convert YAML to JSON instantly in your browser — paste a Kubernetes manifest, Docker Compose file, or any YAML document and get equivalent JSON.
JSON → YAML
Convert JSON to YAML instantly in your browser — useful for turning an API response or config into a Kubernetes-manifest-friendly format.
JSON → CSV
Convert a JSON array of objects into a CSV you can open in Excel or Google Sheets, with a header row from every key and correct quoting. Runs in your browser.
CSV → JSON
Convert a CSV file into a JSON array of objects using the header row as keys, with quoted commas and newlines handled correctly. Runs in your browser.
Encoding tools
Encode, decode, and inspect Base64, URLs, and JSON Web Tokens.
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 back to plain text, including UTF-8 and URL-safe variants, instantly in your browser. No upload, no signup.
JWT Decoder
Decode a JSON Web Token to inspect its header and payload in your browser. No signature verification, no upload — the token never leaves your device.
URL Encoder/Decoder
Percent-encode or decode a URL, query string or individual URL component, with UTF-8 handled correctly, instantly in your browser. No upload, no signup.
Text tools
Test regular expressions, diff text, format SQL, and generate UUIDs.
Regex Tester
Test a regular expression against sample text and see every match highlighted, with capture groups — runs entirely in your browser.
Text Diff
Compare two blocks of text line by line and see exactly what was added, removed, or changed — runs entirely in your browser.
SQL Formatter
Pretty-print a SQL query with one clause per line, indented conditions, nested subqueries and uppercase keywords. Any dialect, entirely in your browser.
UUID Generator
Generate cryptographically random UUID v4 identifiers, one at a time or in bulk, and copy them as a list for fixtures, seeds and tests. Runs in your browser.
HTML Viewer
Paste HTML and see it rendered live beside the source, with syntax highlighting. Runs in a sandboxed frame in your browser — nothing is uploaded.
DevOps tools
Validate Kubernetes, Docker Compose, Dockerfile, and .env files; build cron schedules; convert timestamps; calculate subnets.
K8s YAML Validator
Check a Kubernetes manifest for YAML syntax errors, missing required fields, and common misconfigurations — right in your browser, before you apply it.
Cron Generator
Build a cron expression from simple fields, or paste one to see it explained in plain English — runs entirely in your browser.
Timestamp Converter
Convert a Unix timestamp in seconds or milliseconds to a readable date in local time, UTC and ISO 8601, and convert dates back. Runs entirely in your browser.
CIDR Calculator
Calculate the network address, broadcast address, usable host range, and total host count for an IPv4 CIDR block — runs entirely in your browser.
Compose Validator
Check a docker-compose.yml for YAML syntax errors and common misconfigurations — services missing an image or build, bad port and volume formats, and more.
Dockerfile Checker
Check a Dockerfile for common mistakes — missing USER, latest base image tags, missing WORKDIR, and other image-hygiene issues — right in your browser.
.env Validator
Check a .env file for invalid lines, duplicate keys, unbalanced quotes and naming issues before a dotenv loader misreads it. Runs in your browser, no upload.
Why these tools run in your browser
Most developer utilities online send your input to a server. Logs, tokens, manifests and .env files routinely contain things that should never leave your machine, so every LogShare tool does its work client-side with plain JavaScript — no upload, no storage, no account. Need to share the result with a teammate? Use Log Share for an expiring link, or a private room when only one person should see it.
New to a tool? Every one has a matching step-by-step tutorial with a worked example and the errors people run into.