Backend Developer Toolkit
Format data, generate IDs, model schemas, and wrangle config — all in one place.
Backend work is a steady stream of data plumbing: format a query, validate a config, generate an ID, parse a cron schedule, produce test fixtures. This workspace collects the utilities that come up between writing the actual logic — the connective tissue of building and shipping services.
All local, all instant, so config files and query fragments never touch a third-party server.
The workflow
- 1
Format & validate JSON
Clean up API payloads and config files, and catch structural errors before they ship.
- 2
Tidy your SQL
Format long or minified queries so joins and subqueries are reviewable.
- 3
Generate IDs & fixtures
Create UUIDs for keys and idempotency, and mock data for tests and seeds.
- 4
Decode a cron schedule
Turn a cron expression into a plain-English schedule to confirm when a job actually runs.
Tools in this workspace (9)
JSON Formatter & Validator
Format, validate, and minify JSON documents.
SQL Formatter
Pretty-print SQL queries with dialect-aware formatting.
YAML ⇄ JSON Converter
Convert YAML documents to JSON and back.
UUID Generator
Generate one or many random UUID v4 identifiers.
Hash Generator
Generate MD5, SHA1, SHA256, and SHA512 hashes of your text.
Cron Expression Parser & Builder
Build cron expressions and see their next run times explained.
Mock Data Generator
Generate fake names, emails, and rows as JSON or CSV.
JSON to TypeScript
Generate TypeScript interfaces from a JSON sample.
Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Frequently asked questions
What are the essential online tools for backend developers?＋
A JSON formatter, SQL formatter, YAML/JSON converter, UUID generator, hash generator, cron parser, and a mock-data generator cover most day-to-day backend chores — all bundled here.
Are these tools private?＋
Yes — everything runs in your browser, so your queries, configs, and data stay on your machine.
Is it free?＋
Yes — free and unlimited, no signup.
Related workflows
Last updated August 2026