Developer, Image, Encoding, Network, Debug, Database & Excel tools
right in your browser.
Toolfora is a fast, private toolbox for developers, creators and makers. JSON Formatter/Validator, Image Format Converter, HTML Entity Encoder, WebSocket Debugger, Modbus Tools, SQL Formatter/Explainer & Excel to JSON — all in your browser, your data never leaves your device.
Hot Tools
popular · featured · top picksQR Code Generator
Create custom QR codes from text or URL with logos, captions and full style control.
Open tool →MQTT over WebSocket Debugger
Connect, subscribe, publish and diagnose MQTT over WebSocket brokers.
Open tool →Excel to JSON
Convert .xlsx and .csv files to JSON: preview, pick columns, format or minify, download.
Open tool →JSON to Excel
Convert JSON to Excel (.xlsx) or CSV: nested-object/array expansion, JSONPath extraction, column selection.
Open tool →Excel to SQL
Convert .xlsx / .csv to SQL: INSERT / REPLACE / UPDATE for MySQL, PostgreSQL, SQLite, SQL Server, Oracle.
Open tool →Mock Data Generator
Generate realistic test data from a field schema: pick types, set ranges and constraints, choose a seed, export to JSON, CSV, SQL or Excel.
Open tool →SQL Formatter & Explainer
Format, highlight and explain SQL across MySQL, PostgreSQL, SQLite and Oracle.
Open tool →JWT Decoder
Decode the header and payload of any JWT token locally.
Open tool →WebSocket Debugger
Connect, send, inspect and diagnose WebSocket sessions with multi-tab support.
Open tool →IP / CIDR Subnet Calculator
Compute IPv4/IPv6 subnets, CIDR ranges, masks and IP classes.
Open tool →Caesar Cipher
Encrypt or decrypt text with a Caesar shift.
Open tool →GraphQL Query Builder
Introspect a GraphQL schema, autocomplete queries and inspect responses.
Open tool →Developer Tools
format · hash · decode · convertJSON Formatter & Validator
Format, minify and validate JSON with error reporting.
Open tool →Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes.
Open tool →Timestamp Converter
Convert Unix timestamps to dates and back, in any timezone.
Open tool →JWT Decoder
Decode the header and payload of any JWT token locally.
Open tool →URL Encoder / Decoder
Encode or decode URL components safely.
Open tool →UUID Generator
Generate v1 and v4 UUIDs in bulk.
Open tool →RegEx Tester
Test regular expressions with live match highlighting.
Open tool →Base64 Encoder / Decoder
Encode or decode Base64 text with Unicode support.
Open tool →YAML ↔ JSON Converter
Convert between YAML and JSON formats.
Open tool →CSV ↔ JSON Converter
Convert CSV spreadsheets to JSON and back.
Open tool →Random Password Generator
Generate strong random passwords with custom options.
Open tool →Word & Character Counter
Count words, characters, sentences and reading time.
Open tool →Text Diff / Compare
Compare two texts and highlight the differences.
Open tool →String Escape / Unescape
Escape or unescape strings for JS, JSON, URL and more.
Open tool →Cron Expression Generator
Build and explain cron schedule expressions visually.
Open tool →XML Formatter & Validator
Format, minify and validate XML documents.
Open tool →HMAC Signature
Compute HMAC message authentication codes with SHA-1, SHA-256 or SHA-512.
Open tool →AES Encrypt / Decrypt
AES-128/192/256 encryption and decryption with GCM, CBC and CTR modes.
Open tool →RSA Encrypt / Sign
Generate RSA keys, encrypt/decrypt with OAEP and sign/verify with PSS.
Open tool →Image Tools
convert · compress · resize · colorsImage Format Converter
Convert images between PNG, JPG, WebP and AVIF.
Open tool →Image Compressor
Compress images with a live quality slider.
Open tool →Image Resizer
Resize images by percentage or exact dimensions.
Open tool →Image to Base64
Convert any image file to a Base64 data URI.
Open tool →Color Converter
Convert colors between HEX, RGB and HSL formats.
Open tool →Favicon Generator
Generate favicon.ico and multi-size PNG favicons from any image.
Open tool →QR Code Generator
Create custom QR codes from text or URL with logos, captions and full style control.
Open tool →SVG to PNG / JPEG / WebP
Convert SVG vectors to PNG, JPEG or WebP.
Open tool →Encoding & Text Tools
encode · cipher · convert · generateHTML Entity Encoder
Escape or unescape HTML special characters.
Open tool →Caesar Cipher
Encrypt or decrypt text with a Caesar shift.
Open tool →Morse Code Converter
Convert text to Morse code and back.
Open tool →Number Base Converter
Convert between binary, octal, decimal and hex.
Open tool →Text Case Converter
Convert text to UPPER, lower, Title and more.
Open tool →Number to Words
Convert numbers to English words and currency.
Open tool →Lorem Ipsum Generator
Generate placeholder lorem ipsum text.
Open tool →Log File Analyzer
Analyze large log files in your browser: filter, count levels, timeline, aggregate and export.
Open tool →PCAP / PCAPNG Parser
Parse .pcap and .pcapng capture files: packet list, protocol filter, sessions, statistics.
Open tool →Network Tools
websocket · mqtt · protocol · messagingWebSocket Debugger
Connect, send, inspect and diagnose WebSocket sessions with multi-tab support.
Open tool →MQTT over WebSocket Debugger
Connect, subscribe, publish and diagnose MQTT over WebSocket brokers.
Open tool →DNS Lookup (DoH)
Query DNS records via DNS over HTTPS.
Open tool →IP / CIDR Subnet Calculator
Compute IPv4/IPv6 subnets, CIDR ranges, masks and IP classes.
Open tool →HTTP Headers Analyzer
Analyze and explain HTTP response headers, security and caching.
Open tool →Debug Tools
modbus · serial · frame · industrialDatabase & Query Tools
sql · format · explain · graphqlSQL Formatter & Explainer
Format, highlight and explain SQL across MySQL, PostgreSQL, SQLite and Oracle.
Open tool →GraphQL Query Builder
Introspect a GraphQL schema, autocomplete queries and inspect responses.
Open tool →Mock Data Generator
Generate realistic test data from a field schema: pick types, set ranges and constraints, choose a seed, export to JSON, CSV, SQL or Excel.
Open tool →Excel Tools
xlsx · csv · convert · exportExcel to JSON
Convert .xlsx and .csv files to JSON: preview, pick columns, format or minify, download.
Open tool →JSON to Excel
Convert JSON to Excel (.xlsx) or CSV: nested-object/array expansion, JSONPath extraction, column selection.
Open tool →Excel to CSV / XML / YAML
Convert .xlsx and .csv to CSV, XML or YAML: pick columns, preview, download.
Open tool →Excel to SQL
Convert .xlsx / .csv to SQL: INSERT / REPLACE / UPDATE for MySQL, PostgreSQL, SQLite, SQL Server, Oracle.
Open tool →Excel to API Request Batch
Batch-generate API request bodies from Excel rows: JSON array, cURL list, HTTP text or XLSX export. No requests are sent.
Open tool →Why use Toolfora?
Most "free online tools" quietly upload your data to a server. Toolfora runs entirely in your browser using standard Web APIs. Nothing you paste, upload or type ever touches a network request — ideal for API keys, JWTs, private documents and images.
- Fast & reliable — no page reloads, no waiting, instant results.
- Private by design — client-side processing means your data stays on your device.
- No limits — free forever, no accounts, no watermarks, no hidden fees.
- Works everywhere — any modern browser, desktop or mobile, no installation.