When to use it
Use JSON for structure, Base64 for byte representation and URL encoding for URI text. Hashes compare data integrity; UUIDs generate or inspect identifiers, not passwords.
Voice2Sub Free Tools
Developer tools
Format, encode, hash, and generate common developer data locally.
Inputs and files used by these developer tools stay in your browser.
QR Code GeneratorDeveloper tools
Create a static QR code for text, a link, Wi-Fi or contact details. Download PNG or SVG without sending the payload away.
JSON Formatter & ValidatorDeveloper toolsFormat, minify and validate strict JSON. See duplicate-key, numeric and Unicode risks before copying the result.
Base64 Encoder / DecoderDeveloper toolsEncode or decode text and files using Base64, Base64url or a Data URL. Process the bytes locally.
URL Encoder / DecoderDeveloper toolsEncode or decode URL components, full URIs and form/query text. Handle Unicode and percent escapes explicitly.
Checksum / Hash GeneratorDeveloper toolsCalculate SHA-256, SHA-384 or SHA-512 for text or a file, then compare it with an expected hash. Files stay local.
UUID GeneratorDeveloper toolsGenerate UUID v4 or time-ordered v7 values, or inspect an existing UUID. Choose a valid batch count from 1 to 100.
Do my files or text leave this device?
Your source content is processed in this browser, not uploaded for processing. The browser may download a processing engine from Voice2Sub’s CDN. Those engine requests do not contain your source file.