The whole toolbox.

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176 tools131 available now

HTTP & webhooks

20

Webhook inboxCapture webhook requests and inspect their headers, query parameters, and body.Available

HTTP echoSee exactly what your HTTP client sends.Available

Request replayResend a captured request to a test endpoint.Available

Response builderReturn a custom status, headers, and response body.Available

Redirect testerInspect redirect chains and callback behavior.Available

HTTP status simulatorTest your application against any HTTP status.Available

Delay & timeout simulatorTest client loading states with configurable delays up to two seconds.Available

Fault injectionIntroduce controlled failures into integration tests.Available

SSE testerInspect server-sent events as they arrive.Available

CORS testerCheck cross-origin headers and preflight responses.Available

DNS lookupLook up domain records in one place.Available

DNS propagationCheck how DNS changes are reaching resolvers.Available

SSL & TLS inspectorInspect certificates, expiry, and TLS configuration.Available

WHOIS & RDAP lookupFind publicly available domain registration details.Available

HTTP header inspectorInspect response headers from a URL.Available

Link preview inspectorCheck URL metadata and Open Graph previews.Available

Network diagnosticsCheck connectivity and response latency.Available

Rate-limit simulatorTest retry and backoff behavior against quotas.Available

Mock APIs

12

Mock REST APICreate configurable REST endpoints for integration testing.Available

Stateful CRUD APITest create, read, update, and delete workflows with temporary state.Available

OpenAPI to mockTurn an OpenAPI specification into a mock service.Available

GraphQL mockExplore queries and responses against a stand-in GraphQL API.Available

Mock response templatesCombine dynamic paths, conditions, and response templates.Available

Mock configuration importImport, export, and reuse mock API configurations.Available

Authentication mockSimulate authenticated endpoints and access failures.Available

Third-party API simulatorStand in for external services while you develop.Available

Payment API sandboxSimulate payment events, states, and failure cases.Available

API test scenariosSave and reuse collections of integration test cases.Available

AI & MCP

11

Mock MCP serverGive agents a temporary MCP server with configurable tools.Available

MCP tool-call inspectorInspect tool calls, responses, and request history.Available

MCP server inspectorExplore the capabilities exposed by a remote MCP server.Available

Tool failure simulatorTest how an agent handles errors and tool latency.Available

socket.help MCPCreate and manage platform resources from your AI agent.Available

Files & sharing

8

Temporary file transferUpload a file and pick it up from another machine.Available

One-time download linksShare a file with one allowed download and automatic content removal.Available

Private file sharingRequire a separate access token for temporary file downloads.Available

Temporary JSON storageStore and retrieve a small JSON document over HTTP.Available

Temporary binary storageKeep short-lived binary objects accessible to scripts.Available

Text & code sharingShare an expiring note or code snippet.Available

File metadata inspectorInspect file size, format, and metadata.Available

Everyday tools

42

URL encoderPercent-encode or decode individual URL components and query values.Available

Image compressorMake an image smaller without unnecessary uploads.Available

Image resizerResize images to the dimensions you need.Available

Image converterConvert between common image formats.Available

Image cropperKeep the part of an image that matters.Available

Image metadataInspect an image and its embedded metadata.Available

EXIF removerRemove embedded location and camera metadata.Available

Color extractorFind colors used in an image.Available

Simple image editorMake small edits to an image.Available

Merge PDFsCombine several PDF documents into one.Available

Split PDFSeparate a PDF into smaller documents.Available

Compress PDFReduce the size of a PDF.Available

PDF to imageTurn PDF pages into images.Available

Image to PDFCombine images into a PDF document.Available

Reorder PDF pagesRearrange the pages in a PDF.Available

Extract PDF textGet readable text out of a PDF.Available

Document converterConvert between supported document formats.Available

Video compressorReduce video file size.Available

Video converterConvert video between supported formats.Available

Audio extractorSave the audio track from a video.Available

Audio converterConvert an audio file to another format.Available

Video trimmerKeep the section of a video you need.Available

GIF makerCreate a GIF from a short video.Available

Audio trimmerTrim an audio file down to the useful part.Available

Media metadataInspect video and audio file details.Available

Text formatterClean up the layout of a block of text.Available

Text comparisonSee the differences between two pieces of text.Available

Case converterSwitch text between common capitalization styles.Available

Markdown previewSee how your Markdown will look.Available

CSV to JSONTurn tabular CSV data into JSON.Available

JSON to CSVTurn a JSON array into a CSV file.Available

Data format converterConvert between JSON and YAML in your browser.Available

Text cleanerRemove unwanted whitespace and tidy copied text.Available

QR code generatorMake a QR code for a link or a piece of text.Available

Barcode generatorCreate a barcode from supported input.Available

Unit converterConvert measurements between common units.Available

Timestamp converterMove between readable dates and timestamps.Available

Password generatorCreate a strong random password.Available

Random generatorGenerate random values for everyday tasks.Available

File checksumsCalculate a checksum for a local file.Available

Temporary notesShare a short note with an expiration time.Available

Email & inboxes

8

Email inspectorRead headers, MIME content, and delivery details.Available

Attachment inspectorInspect attachments received by a test inbox.Available

Email HTML previewPreview the HTML content of received email.Available

Email verification testerTest signup and email verification workflows.Available

Email template testerPreview and inspect transactional email templates.Available

Domains & tunnels

8

Temporary callback URLGive a test integration a public callback address.Available

Domain validationValidate domain ownership and DNS configuration.Available

Monitoring & status

10

Databases & state

8

Test fixturesPrepare reusable data for integration tests.Available

Seed data generatorCreate sample records for a development database.Available

Test files & media

18

Placeholder imagesCreate configurable illustrations, gradients and graphics as SVG or PNG.Available

Sample videoGet a predictable video fixture for testing.Available

Silent videoGenerate a video fixture without an audio track.Available

Sample audioCreate an editable instrumental sample with melody, bass and drums.Available

Audio composerArrange melody, bass, drums and pads into a custom instrumental.Available

Music libraryStream full original CC0 instrumentals and download editable loops.Available

Tone generatorGenerate a simple audio tone.Available

Sample PDFCreate a PDF fixture for upload and document tests.Available

Dummy CSVGenerate rows of sample CSV data.Available

JSON fixturesCreate structured JSON test payloads.Available

XML fixturesCreate predictable XML test documents.Available

ZIP generatorBuild a sample archive for file handling tests.Available

Binary payload generatorGenerate a test payload with a chosen file size.Available

Corrupt file fixturesTest how your application handles malformed files.Available

Streaming response simulatorGenerate a controlled stream of response data.Available

SSE generatorProduce server-sent events for a client test.Available

Media stream fixturesTest audio and video streaming behavior.Available

Sample avatarsCreate consistent avatars with styles, palettes, shapes and variations.Available

Developer utilities

23

JSON formatterFormat, validate, or minify JSON locally in your browser.Available

Base64 encoderEncode UTF-8 text as Base64 or decode a Base64 text value locally.Available

UUID generatorGenerate up to 100 cryptographically random version 4 UUIDs locally.Available

Hash generatorCalculate SHA-256, SHA-384, and SHA-512 hashes.Available

Credit card generatorCreate credit-card test fixtures using published Stripe sandbox numbers.Available

Debit card generatorCreate Visa and Mastercard debit-card fixtures for sandbox testing.Available

Prepaid card generatorCreate Mastercard prepaid fixtures for Stripe sandbox checkout tests.Available

Card number validatorCheck the Luhn checksum of a test card number locally.Available

YAML formatterFormat and validate YAML data.Available

XML formatterMake an XML document readable.Available

Regex testerTry a regular expression against sample text.Available

JWT inspectorDecode a token and inspect its header and claims.Available

URL parserInspect the components of a URL.Available

ULID generatorGenerate sortable unique identifiers.Available

Cron expression helperBuild and understand a cron schedule.Available

Unix timestamp converterConvert Unix timestamps to readable dates.Available

HMAC generatorCalculate keyed message authentication codes.Available

HTTP request builderPrepare a request with headers, parameters, and a body.Available

cURL builder & parserCreate a cURL command or inspect an existing one.Available

Code diff checkerCompare two versions of a code snippet.Available

Environment variable formatterClean up and convert environment variable definitions.Available

API response formatterMake a captured API response easier to read.Available

Code paste sharingShare an expiring code snippet.Available

Automation

8

“Coming soon” means planned, not available. We’ll only mark a tool ready when you can actually use it.