28 FREE TOOLS · PASTE → FIX → COPY · ZERO BYTES UPLOADED
Paste broken JSON, get clean valid code in seconds.
Nothing you paste ever leaves your browser.
Formatter, validator, JSON to CSV, Base64 and 24 more. Paste, convert, copy. No signup, no upload, free forever.
One click demo, no upload needed. See before and after in 2 seconds.
Starred & waiting
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Browse by task
Every tool shares one editor and runs entirely on your machine. Star the ones you reach for, they pin to your space above. Prefer a collection view, see JSON Tools, Encoding or Data Formats.
Convert
10Move data between formats without leaving the browser.
- JSON → CSVFlatten nested JSON arrays into clean CSV tables.
- TOML → JSONConvert TOML configs into JSON.
- CSV → JSONConvert CSV files into structured JSON.
- JSON → XMLTransform JSON into well-formed XML.
- XML → JSONParse XML documents into JSON objects.
- YAML → JSONConvert YAML configs into JSON.
- JSON → YAMLTurn JSON into readable YAML.
- CSV → TSVConvert comma-separated tables into tab-separated values.
- TSV → CSVTurn tab-separated tables into clean, quoted CSV.
- JSON → TOMLTurn JSON into readable TOML.
Format
2Beautify, minify, and normalize structured data.
Validate
2Catch syntax and schema errors before they ship.
Compare
2Diff two inputs and see exactly what changed.
Generate
2Mock data, IDs, and sample payloads on demand.
Utilities
10The everyday encode / decode / inspect toolbox.
- Base64 Encode / DecodeEncode and decode Base64 in the browser.
- URL Encode / DecodePercent-encode and decode URL components.
- JWT DecoderDecode JWT header, payload, and signature — no verification server.
- Timestamp ConverterConvert Unix timestamps to human dates and back.
- Regex TesterTest regular expressions with live matches and capture groups.
- SHA-256 Hash GeneratorGenerate secure SHA-256 hashes from text or files.
- SHA-512 Hash GeneratorGenerate SHA-512 hashes for high-security applications.
- MD5 Hash GeneratorGenerate MD5 checksums (legacy use only).
- HMAC GeneratorGenerate Hash-based Message Authentication Codes.
- bcrypt Password HasherGenerate secure bcrypt hashes for passwords.
Nothing you paste ever leaves this tab.
There is no backend endpoint for your content to be sent to, because none was ever built. Conversion, formatting and validation happen on your own machine. The trust you place here is trust in your browser, not in our infrastructure.
See the live proof & architecture →- No uploads. Your input is parsed in memory, never transmitted
- No accounts, no sessions, nothing to leak
- No telemetry on your content. Analytics sees page views only
- Open source. Every byte that touches your data is public
- Works offline once loaded. Heavy work runs in a Web Worker
Compare, side by side
Shipped in the open
The roadmap follows demand. Nothing here is filler. A tool appears the moment it works.
Before you ask
Is my data uploaded anywhere?
No. Every tool processes your input locally in your browser, in a Web Worker when a file is large. Nothing you paste or drop leaves your machine.
Do I need an account?
No. There is no sign‑up, no session and no server‑side record of anything you process. Your starred tools and recents live only in your own browser.
Does it work offline?
Once a page has loaded, the tools keep working without a connection. The logic ships with the page, not a server.
How do I find the right tool fast?
Press ⌘K (or /) anywhere to open the command palette, a fuzzy search over every tool with your recent ones on top. Or browse the catalog by category above.