JSON Formatter & Validator
Format, beautify, and validate JSON data online. Detect syntax errors instantly.
dataJWT Decoder
Decode JSON Web Tokens to view header and payload. No verification required.
securityUUID Generator
Generate UUID v4 identifiers instantly. Copy with one click.
utilityUnix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
utilityBase64 Encode/Decode
Encode text to Base64 or decode Base64 strings back to plain text.
encodingLog Analyzer
Upload log files to analyze errors, top IP addresses, and status code frequencies.
analysisText Diff Checker
Compare two texts and highlight additions, deletions, and differences.
comparisonCSV ↔ JSON Converter
Convert CSV to JSON or JSON to CSV with robust parsing.
data100% Private
All tools run entirely in your browser. Your JSON, tokens, and log files never leave your device. Open DevTools → Network tab → verify zero requests.
Blazing Fast
Next.js + global edge network. Pages load in under a second. No server round-trips, no loading spinners — just instant results.
Always Free
No signup, no paywalls, no daily limits. Ad-supported, but ads never touch your data — because we don't have your data.
Developer utilities you actually need
ToolsWalla collects the small utilities developers reach for dozens of times a day: formatting a messy JSON payload from an API response, decoding a JWT to debug an auth issue, generating a UUID for a test fixture, comparing two config files, or pulling the top error lines out of a 50MB log file. Each tool is designed to do one thing well and get out of your way.
Unlike most online tools, everything on ToolsWalla is client-side. The JSON formatter uses your browser's native JSON parser. The JWT decoder does base64url decoding locally. The log analyzer reads your file with the File API and runs regex in-browser. No data is uploaded, stored, or transmitted to any server.
The site is built on well-tested open-source libraries — PapaParse for robust CSV parsing, jsdiff for text comparison, and the RFC 4122-compliant uuid library. No fragile custom parsers that break on edge cases. The result: tools that handle real-world input reliably, from Apache log files with mixed formats to JSON with nested arrays and Unicode.
Everything is responsive and works on mobile, tablet, and desktop. All tools are free forever, with no usage limits. New tools are added regularly — if there's a utility you find yourself searching for often, let us know via the contact page.