8 free AI-powered tools — generate datasets, clean CSV files, write SQL, mock APIs, anonymize PII and convert between formats. Instant results, no account needed.
Each tool solves a specific developer pain point. No bloat, no pricing tiers — free, instant, AI-powered utilities that just work.
Paste any SQL schema and get a realistic, fully populated dataset instantly. Understands foreign keys, constraints and relationships across multiple tables.
Describe your dataset in plain English and get realistic structured data in seconds. Supports Indian, US and UK locales with follow-up refinement.
Paste any OpenAPI spec, GraphQL schema, URL or plain English — get realistic mock API responses with errors, pagination and auth headers.
Describe what you want in plain English and get production-ready SQL instantly. Supports PostgreSQL, MySQL, T-SQL, SQLite and BigQuery.
Upload any messy CSV or JSON — AI detects and fixes nulls, duplicates, type mismatches, date formats and whitespace. Download clean data instantly.
AI detects names, emails, Aadhaar, SSN, credit cards and 20+ PII types. Mask, fake or use placeholders per field. GDPR, HIPAA and India DPDP compliant.
Instantly convert between JSON, CSV, YAML, XML and Excel. Paste or upload your data, select input and output formats, download in one click. Zero AI cost — pure instant conversion. The fastest free JSON to CSV converter, CSV to Excel converter, YAML to JSON converter and XML to CSV converter online.
Format, minify, validate and sort JSON instantly. Paste any JSON string and get it pretty-printed with your chosen indent, or minified for production. Validation returns the exact line number, column and a plain English fix suggestion for every error. Zero AI cost — instant results.
Practical developer guides — data cleaning, JSON formatting, SQL generation, PII anonymization and format conversion.
Generate realistic seed data for databases, mock API responses for frontend teams, and write complex SQL without memorising syntax.
Create thousands of test records with realistic distributions. Cover edge cases with null values, duplicates and type mismatches built in.
Clean messy spreadsheets in one click. Convert between formats without writing scripts. Anonymize sensitive data before sharing with teams.
GDPR, HIPAA and India DPDP compliant PII anonymization. No data stored on servers. Secure AWS Bedrock AI processing with full audit trail.
Yes. All 8 tools on Sylvaera are completely free. No account, no credit card, no usage limits for standard datasets.
Use Sylvaera's free JSON Formatter. Paste your JSON, choose your indent size (2, 4, or 8 spaces), and click Format. You can also minify JSON, validate it, or sort keys alphabetically.
Use Sylvaera's free Data Format Converter. Paste your JSON, select JSON as input and CSV as output, and click Convert. Download your CSV file instantly.
A PII anonymizer detects and removes or replaces personally identifiable information like names, emails, Aadhaar numbers, and credit cards. Essential for GDPR, HIPAA, and India DPDP compliance.
Yes. The Schema to Dataset tool accepts any SQL CREATE TABLE statement and generates realistic, relationally consistent test data across multiple tables.