Local File Tools
Inspect, verify and transform selected files directly in your browser without uploading their contents or using downloader workers.
Private SQLite Database Viewer
Inspect tables, column declarations and row counts from a local SQLite database without uploading the database or modifying it.
Open tool →Private Read-only SQLite Query
Run one bounded SELECT, WITH or EXPLAIN statement against a local SQLite file in query-only browser memory.
Open tool →Private SQLite Table to CSV
Export one named table from a local SQLite database to standards-compatible CSV without transmitting the database.
Open tool →Private BLAKE3 File Checksum
Calculate a 256-bit BLAKE3 checksum from a local file with incremental browser-side hashing and no upload.
Open tool →Private GIF Frame Extractor
Decode an animated GIF locally and download every composited frame as a numbered PNG inside one ZIP archive, without uploading the animation.
Open tool →Private Animated GIF Maker
Combine up to 30 local PNG, JPEG, WebP or BMP images into one animated GIF with explicit frame timing and fit rules, without uploading the source frames.
Open tool →Private Animated GIF Resizer
Resize every composited frame of an animated GIF to exact bounded dimensions while preserving frame order and timing entirely in the browser.
Open tool →Private Animated GIF Cropper
Crop the same validated rectangle from every frame of an animated GIF and export a new looping animation without sending pixels to the server.
Open tool →Private GIF Speed Changer
Speed up or slow down an animated GIF by changing its bounded frame delays while leaving the composited visual frames local to this browser tab.
Open tool →Private Reverse GIF Tool
Reverse the visible frame sequence of an animated GIF while retaining each frame's associated duration and processing every pixel locally.
Open tool →Private Image Watermark Maker
Overlay a second local image as a scaled, positioned watermark and export a clean PNG without uploading either source file.
Open tool →Private JSON to XLSX Converter
Convert a bounded JSON array of objects into a real XLSX worksheet locally, with stable columns, explicit nested-value handling and no upload.
Open tool →Private JSON to SQL INSERT Converter
Convert a bounded JSON array of objects into escaped transaction-wrapped SQL INSERT text locally while preserving explicit JSON primitive types.
Open tool →Local File Information Viewer
Inspect a file's name, size, declared MIME type and modification time entirely in your browser without uploading the selected file.
Open tool →File Type and Magic Byte Detector
Compare a file's extension and MIME declaration with common binary signatures entirely in your browser without uploading the selected file.
Open tool →SHA-1 File Hash Calculator
Calculate a reproducible SHA-1 digest for local integrity checks entirely in your browser without uploading the selected file.
Open tool →SHA-256 File Hash Calculator
Calculate a reproducible SHA-256 digest for local integrity checks entirely in your browser without uploading the selected file.
Open tool →SHA-384 File Hash Calculator
Calculate a reproducible SHA-384 digest for local integrity checks entirely in your browser without uploading the selected file.
Open tool →SHA-512 File Hash Calculator
Calculate a reproducible SHA-512 digest for local integrity checks entirely in your browser without uploading the selected file.
Open tool →Local File Checksum Verifier
Compare a locally calculated digest with an expected checksum entirely in your browser without uploading the selected file.
Open tool →Gzip File Compressor
Compress one file into a standards-based gzip stream entirely in your browser without uploading the selected file.
Open tool →Gzip File Decompressor
Decompress a gzip stream into its original local bytes entirely in your browser without uploading the selected file.
Open tool →Local Image Resizer
Resize a PNG, JPEG, WebP or BMP image to exact pixel dimensions entirely in your browser without uploading the selected file.
Open tool →Local Image Compressor
Re-encode an image with a visible quality setting and measured result size entirely in your browser without uploading the selected file.
Open tool →No matching tools on this page.