Privacy-first toolkit
ConvertPass
Local-first converters for developers and media.
Convert JSON, images, and AI-image metadata in your browser. Files are not uploaded or stored. No account required.
Categories
All toolsDeveloperJSON, YAML, CSV, XML, TOML, dotenv, Base64, JWT, hashes, and other local text tools. No account required.ImageConvert, resize, compress, and inspect images locally. EXIF and GPS stay on your device unless you choose to copy them.AI imageInspect PNG chunks, extract ComfyUI workflows, and strip generation metadata. Unknown fields stay labelled unknown.VideoInspect duration and resolution, and calculate bitrate, frame rate, and export starting points. No unrestricted transcode farm.FileCross-format file utilities that do not retain uploads. More file-type tools will land as they meet the quality gate.
Featured tools
developerJSON formatterPretty-print JSON locally with clear parse errors and a one-click copy.developerJSON to YAMLTurn JSON into readable YAML without leaving your machine.developerJSON to CSVTurn a JSON array into CSV without dropping nested values on the floor.developerCSV to JSONParse real CSV into JSON without breaking on commas inside quotes.developerBase64 encoder and decoderEncode or decode Base64 without uploading the payload.developerJWT decoderRead a JWT’s JSON claims locally. This is not signature validation.imageImage converterConvert images on-device, with honest limits for animation and AVIF support.imageImage compressorReduce image weight in the browser and see the new file size before you download.imageEXIF viewerInspect EXIF and GPS locally, with tags treated as untrusted strings.imageImage metadata removerStrip location and camera metadata before you share a photo.ai-imageAI-image metadata viewerSee whether an image still contains AI prompts — and say so only when it does.ai-imagePNG chunk inspectorSee every PNG chunk, including the ones that hide prompts.ai-imageComfyUI workflow extractorPull ComfyUI workflow JSON out of a PNG when the chunks are still there.videoVideo file inspectorRead duration and resolution from a video without uploading it.