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Developer Tools That Just Work

Format JSON, run SQL queries, write Java, format Python — all free, all instant, all in your browser.

All 📋 JSON 1 💻 Code 5 📝 Text 4 ⚡ Generator 8 📄 Diff Checker 1 🐍 Python 2
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UUID Generator

Generate v1/v3/v4/v5/v6/v7 UUIDs, bulk export, validate, decode timestamps, namespace hashing — client-side.

Generator 86 uses
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Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text

Generator 92 uses
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Barcode Calculator

Bulk calculate and validate GTIN-8/12/13/14 check digits — GS1 mod-10, up to 1M rows.

Generator 184 uses
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Barcode Repair Tool

Recover smudged GTINs using ? or * wildcards — brute-force valid check digits.

Generator 150 uses
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Barcode Identifier

Identify GTIN, ISBN, GS1-128, Digital Link, VIN, IMEI, ASIN from any pasted code.

Generator 180 uses
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GS1 Digital Link Generator

Convert GTINs to GS1 Digital Link URLs with batch, expiry, and serial qualifiers — bulk mode.

Generator 136 uses
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GS1-128 Parser

Decode GS1-128 paren or FNC1 barcodes with per-AI breakdown — single and bulk.

Generator 128 uses
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ISBN Converter

Convert ISBN-10 ↔ ISBN-13 with check digit validation and hyphenation.

Generator 134 uses