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LiveParse: free developer tools that never upload your data

Format JSON, SQL, YAML, and XML. Test regular expressions, calculate business days, ages, and timestamps. Encode Base64 and URLs, hash files, generate UUIDs, decode JWTs, compress images, and translate Morse code. Every LiveParse tool runs inside this browser tab, so pasted data and selected files stay on your machine.

Browse all tools Open the JSON formatter
liveparse.com
json     format · compare · repair · convert
sql      15 dialects
dates    business days · epoch · age
upload   never

Local by designNo accounts, ads, or tracking scripts

Most used this month

Start with the pages people reach most often, or jump to a category below. Each tool is an independent page with its own guide, limits, and standards references.

Unix Timestamp Converter

Convert epoch seconds, milliseconds, microseconds, and nanoseconds to dates without losing precision.

JSON

JSON tools

Lossless parsing that keeps 64-bit IDs, exponent notation, and duplicate keys exactly as written.

JSON Repair

Fix broken JSON with a before/after diff, confidence, and a change log.

JSON to CSV

Flatten nested fields, keep large IDs exact, and download clean CSV.

CSV to JSON

Parse quoted and multiline CSV into a valid JSON array.

YAML and XML

YAML and XML tools

Format, validate, view, and convert with YAML 1.1/1.2 selection and no external DTD or schema retrieval.

YAML Formatter

Reserialize YAML with bounded input, depth, and node limits.

YAML Validator

Syntax errors, unresolved aliases, and duplicate keys with exact locations.

YAML Viewer

Explore multi-document YAML in a non-expanding searchable tree.

YAML to JSON

Convert with exact big integers and explicit type-conversion rules.

JSON to YAML

Turn strict JSON into YAML 1.2 while keeping number tokens intact.

XML Formatter

Pretty-print XML 1.0 with controlled indentation in a disposable worker.

XML Validator

Check well-formedness and namespace constraints with precise errors.

XML Viewer

Elements, attributes, namespaces, comments, and CDATA as a safe text tree.

SQL

SQL formatters

Fifteen dialects formatted in a time-bounded Web Worker. No query is ever executed.

SQL Formatter

Standard SQL plus MySQL, PostgreSQL, SQLite, Snowflake, Oracle, and more.

MySQL Formatter

MySQL and MariaDB layout with explicit keyword and indentation controls.

Dates and time

Timestamp and date calculators

Exact epoch conversion and pure calendar arithmetic with explicit weekend, leap-day, and endpoint rules.

Date Calculator

Add or subtract days, weeks, months, or years from any date.

Age Calculator

Exact age in years, months, and days with a stated February 29 policy.

Encoding and numbers

Regex, encoding, URL, and number tools

JavaScript regex testing, RFC-aware Base64 and URL handling, arbitrary-precision base conversion, and International Morse code.

Base64 Decoder

Standard Base64, Base64URL, files, and Data URLs with RFC diagnostics.

Base64 Encoder

Encode UTF-8 text or local files as Base64, Base64URL, or a Data URL.

URL Encoder

Component, full-URI, RFC 3986, and form encoding kept distinct.

URL Decoder

Strictly decode one round and surface malformed escapes.

URL Parser

Inspect WHATWG URL components with IDN and credential warnings.

Binary Converter

Exact integers between binary, decimal, hex, octal, and any base 2–36.

Hex Converter

Hex integers to other bases, or strict hex bytes to UTF-8 text.

ASCII Table

All 128 codes searchable by symbol, decimal, hex, octal, or binary.

Hashes, UUIDs, and JWTs

Hash, checksum, identifier, and token tools

SHA-2 and MD5 digests from text or exact file bytes, RFC 9562 UUIDs, and strict JWT decoding without a verification claim.

Hash Generator

SHA-256, SHA-384, SHA-512, and MD5 from text or files, in hex or Base64.

MD5 Generator

Legacy MD5 checksums with a clear collision warning.

File Checksum

Verify a downloaded file against a published digest locally.

UUID Validator

Strict or normalized validation for versions 1 through 8.

UUID Decoder

Version, variant, and v1/v6/v7 timestamp fields.

JWT Decoder

Strict compact JWS decoding with lossless claim numbers.

Images and text

Image converters and text counters

Static images are decoded and re-encoded locally; text metrics use Unicode-aware segmentation.

Image Compressor

Compress up to 20 JPEG, PNG, or WebP images toward a target size, then download a ZIP.

Image Resizer

Resize by pixels or percent with aspect-ratio and no-upscale controls.

PNG to JPG

Convert PNG to JPEG with a chosen background for transparency.

WebP to PNG

Lossless PNG output that preserves transparency.

About the project

What is LiveParse?

One name, one site

LiveParse (also written Liveparse or Live Parse) is the developer data toolkit published at liveparse.com. It began as a lossless JSON parser and now covers YAML, XML, SQL, URLs, timestamps, calendar math, images, Base64, hashes, UUIDs, JWTs, and Morse code.

Local-first by principle

Every LiveParse tool runs in the browser tab. Pasted data and selected files are never posted to a LiveParse server, and the site loads no advertising or tracking scripts. Read the privacy notice for the full processing boundary.

Built in the open

LiveParse is developed by Jackson Jang, and the source is public on GitHub. Read the About LiveParse page for the project background, principles, and full tool catalog.

Learn the formats

Guides behind the tools

Browse all guides

UUID v4 vs v7

Random versus time-ordered identifiers and when each fits.