LogSieve - single-file web app

Upload

Drag and drop a log file here, or

Simple flow

Load a log, JSON, NDJSON, or CSV file.
Use Analyze to add filters, extractors, transforms, or column changes.
Run the pipeline and review the Results table below.

Analyze

Configure the analysis, then run it once.

Filters narrow rows. Extractors add structure. Transforms reshape fields. Columns controls what stays visible and what gets exported.

Review pipeline order

Every run starts from the original parsed rows. Drag steps to reorder them, or uncheck a step to skip it without deleting it.

No pipeline steps yet. Add filter rules, extractors, or transformations.

Filters and Sort

Start with builder rules. Open Advanced Query only if you need field syntax, regex, or boolean logic.

Saved filter

-

Sort Order Page size

Advanced Query

Use this for free-form field queries, regex, AND/OR/NOT logic, or field:value syntax.

Advanced Text Query

Manage Saved Filters

Extractor Library

Apply to -

No extractors saved. Click "+ New Extractor" to create one.

Extractor options

Merge Strategy

When multiple active extractors capture the same field name, this setting determines which value is kept.

Quick Test

Pattern

Transformations

Name Source Field Operation Option (path/tag/js expression) Target Field (optional)

No transformations saved. Add one above.

Unsafe JS transform option

Enable Unsafe JS transforms

JS expressions run in a worker with limits, but they are still unsafe for untrusted input.

Results

Summary Statistics

Rows

0

INFO

0

WARN

0

ERROR

0

no file 0 lines no filters

1 / 1

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Times shown in UTC by default

ID	Timestamp	Level	Message

Upload

Analyze

Columns

Filters and Sort

Extractor Library

Transformations

Results

New Extractor

Save Filter