A complete, privacy-first developer toolbox
djdata.io brings together more than 50 tools that developers, data engineers, and IT professionals reach for every day — parsing a SWIFT MT message, validating an IBAN, decoding a JWT, formatting a stubborn JSON payload, testing a regular expression, or converting a CIDR block into an IP range. Instead of hunting across a dozen ad-heavy websites of uncertain quality, you get a single, consistent, and reliable place to get the job done.
Every tool is built around the same promise: your data never leaves your browser. There is no account to create, no upload step, and no usage limit. You open a tool, paste your data, and get an answer instantly.
How it works: everything runs locally
The tools on djdata.io are not a thin front-end over a remote API. All processing happens client-side, in JavaScript, directly on your machine. When you paste a confidential bank file, a private key, or a production log, that content is parsed in your browser and is never transmitted, logged, or stored anywhere. You can even disconnect from the network after the page has loaded and most tools will keep working.
This is an architectural choice, not just a policy. Because there is no backend handling your data, there is simply nothing on a server to leak, sell, or subpoena. For anyone working with sensitive financial, personal, or security-related information, that distinction matters.
What you can do here
The catalog is organized into eight focused categories so you can find the right tool quickly:
- Financial Parsers — Read and analyze banking and payment formats: SWIFT MT, ISO 20022, NACHA/ACH, Fedwire, ISO 8583, EDI X12, Check 21, Positive Pay, BAI2, and card-clearing data.
- Formatters & Validators — Beautify and validate JSON, SQL, and XML, validate IBAN and BIC/SWIFT codes, check XML against a schema, work with SemVer, and preview Markdown.
- Encoders / Decoders — Encode and decode Base64 and URLs, inspect JWTs and X.509 certificates, generate hashes, RSA keys, and strong passwords, and convert between number bases.
- Generators — Produce UUIDs, ULIDs, Lorem Ipsum, random data, XSD schemas from samples, and PKCE pairs for OAuth 2.0.
- Network Tools — Validate IPv4/IPv6 addresses, check subnet membership, sort and compare IPs, extract addresses from free text, and convert between CIDR and ranges.
- Text Tools — Analyze text statistics, anonymize sensitive data, compare two texts or lists, and convert between delimiters.
- General Tools — Parse cron expressions, analyze logs, test regular expressions, and evaluate JSONPath queries.
- Converters — Convert dates and times, transform JSON to tables and back, and convert between image formats.
Who it’s for
These tools are designed for the people who touch data all day: backend and full-stack developers, data and platform engineers, QA and support engineers, security analysts, and anyone in fintech or IT who regularly inspects machine formats. Each tool ships with a clear explanation, real examples, and notes on common pitfalls, so it doubles as a quick reference when you need to understand a format, not just transform it.
Frequently asked questions
Is djdata.io really free? Yes. Every tool is free to use, with no sign-up and no limits.
Do you store or send my data? No. All processing happens in your browser. Nothing you paste is uploaded to a server.
Do I need to install anything? No. The tools run in any modern browser, with no extension or download required.
Which languages are available? The entire site is available in English, French, and Spanish.